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diff --git a/.editorconfig b/.editorconfig
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index 0000000..7725cf1
--- /dev/null
+++ b/.editorconfig
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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+spelling_language = de_DE
+
+[*.{html,js,php,css}]
+indent_style = space
+indent_size = 2
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a864087
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+node_modules
+dist
+config.php
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
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+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3e08eda
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,24 @@
+JS := node_modules/chart.js/dist/chart.umd.js node_modules/chart.js/dist/chart.umd.js.map index.js
+PHP := index.php lade_daten.php config.php
+CSS := index.css
+
+.PHONY: all
+all: dist/js dist/php dist/index.css
+
+dist:
+	mkdir -p $@
+
+dist/js: $(JS) dist
+	mkdir -p $@
+	for js in $(JS); do cp $$js $@; done
+
+.PHONY: dist/php
+dist/php: $(PHP) dist
+	for php in $(PHP); do cp $$php ${@D}; done
+
+dist/index.css: index.css
+	cp $< $@
+
+.PHONY: clean
+clean:
+	rm -rf dist
diff --git a/Readme.md b/Readme.md
new file mode 100644
index 0000000..ab4a9c1
--- /dev/null
+++ b/Readme.md
@@ -0,0 +1,119 @@
+# Punktestand - zeigt den Punktestand für die Klassen eines Jahrgangs an
+
+Dieses Repository enthält den Quellcode und zusätzliche Werkzeuge, um eine Webseite, die den Punktestand von Klassen innerhalb eines Jahrgangs anzeigt, zu betreiben.
+
+```
+.
+├── config.php - Konfigurationsdatei
+├── config.php.sample - Beispiel Konfigurationsdatei
+├── dist
+│   └── ...
+├── index.css - CSS Code der das Aussehen der HTML-Elemente bestimmt
+├── index.js - Javascript Code der zum Zeichnen des Diagramms und zum Erstellen der Ereignisliste
+├── index.php - Einstiegspunkt der Webseite
+├── lade_daten.php - PHP-Datei die die lade_daten Funktion definiert
+├── Makefile - Makefile um alle Dateien an die richtige Stelle zu kopieren
+├── node_modules - Ordner in dem npm weitere Javascript Dateien ablegt
+│   └── ...
+├── package.json - npm Definition der Webseite
+├── package-lock.json - Versionen der verwendeten externen Javascript Dateien
+├── Readme.md - Diese Datei
+├── scripts - Hilfsprogramme
+│   └── erzeuge_jahrgang.py - 
+└── sql - SQL Dateien
+    ├── dummydaten.sql - Enthält einige Dummy Daten um die Webseite zu testen
+    └── init.sql - Enthält die Tabellen Definitionen
+```
+
+## Webseite
+
+Die Webseite verwendet PHP um bei einem Aufruf die passenden Daten auf dem Server aus der Datenbank zu laden und in die Webseite einzubetten. 
+Anschließend werden die Daten durch Javascript mit Hilfe der Bibliothek [chart.js](https://www.chartjs.org/) graphisch als Balkendiagramm angezeigt.
+Zusätzlich enthält die Webseite eine Liste aller Ereignisse die zu dem aktuellen Punktestand geführt haben.
+
+## Datenbank
+
+Die Webseite unterstützt theoretisch alle SQL kompatiblen Datenbanken die über den generischen PHP Datenbankenadapter [PDO](https://www.php.net/manual/en/book.pdo.php) verwendbar sind.
+Getestet ist allerdings nur [sqlite](https://sqlite.org/index.html) als Datenbank.
+
+### Schema
+
+Die Datenbank besteht aus zwei Tabellen:
+
+```sql
+CREATE TABLE Klasse (
+  Schuljahr TEXT,
+  Jahrgang INTEGER,
+  Bezeichner TEXT,
+  Farbe TEXT,
+  PRIMARY KEY(Jahrgang, Bezeichner, Schuljahr)
+);
+
+CREATE TABLE Ereignis (
+  Id INTEGER,
+  Schuljahr TEXT NOT NULL,
+  Jahrgang INTEGER NOT NULL,
+  Bezeichner TEXT NOT NULL,
+  Datum DATETIME,
+  Delta INTEGER NOT NULL,
+  Beschreibung TEXT,
+  PRIMARY KEY(Id AUTOINCREMENT),
+  FOREIGN KEY(Jahrgang, Bezeichner, Schuljahr)
+    REFERENCES Klasse(Jahrgang, Bezeichner, Klasse)
+);
+```
+
+### Wo kommen die Daten her?
+
+Die initiale leere Datenbank kann mit den SQL-Statements in der Datei `sql/init.sql` erzeugt werden.
+Um eine sqlite Datenbank namens `punktestand.sqlite` zu erzeugen, kannst du den Befehl `$ sqlite punktestand.sqlite < sql/init.sql` ausführen.
+
+Das Programm `scripts/erzeuge_jahrgang.py` hielt dabei alle Klassen eines Jahrgangs anzulegen.
+
+```bash
+$ scripts/erzeuge_jahrgang.py 2526 7 d | sqlite punktestand.sqlite
+```
+
+Der Befehl fügt die Klassen 7a bis 7d aus dem Schuljahr 2025/2026 der Tabelle `Klasse` in der sqlite Datenbank `punktestand.sqlite` hinzu.
+
+
+## Tüfeln und Basteln
+
+Dieses Repository ist für die Entwicklung mit einem UNIX-artigen System (Linux, MacOS) ausgelegt.
+Wenn du Schwierigkeiten mit einem Windows-System hast oder diese Anleitung ergänzen möchtest, kontaktiere mich gerne.
+
+Um an der Webseite zuarbeiten, kann der einfach in PHP integrierte Webserver verwendet werden.
+Dazu benötigst du PHP und ein geeignetes Datenbanksystem.
+Wichtig ist, dass die entsprechenden PHP Pakete zur Kommunikation mit dem Datenbanksystem installiert und aktiviert sind.
+
+Um eine sqlite Datenbank zu verwenden muss sowohl die `sqlite3` also auch `pdo_sqlite` extension in deiner `php.ini` Datei aktiviert sein.
+
+Du kannst alle Bestandteile der Webseite mit den folgenden Befehlen in den `dist`  Unterordner kopieren und diesen unter [`http://localhost:8080`](http://localhost:8080) erreichbar machen.
+
+```
+$ make
+...
+$ cd dist
+dist $ php -S localhost:8080
+```
+
+Dein Webbrowser lädt automatisch beim Aufruf von [`http://localhost:8080`](http://localhost:8080) die `index.php` Datei.
+
+Um deine Änderungen in Aktion zu sehen, musst du sie erneut in den `dist` Unterordner kopieren.
+Am leichtesten geht das mit dem enthaltenen Makefile und dem Befehl: `make`.
+
+## Lizenz
+
+Der Code der Webseite und alle zusätzlichen Materialien sind unter
+GPL-3.0-or-later verfügbar.
+
+Punktestand is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later version.
+
+Punktestand is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+Punktestand. If not, see <https://www.gnu.org/licenses/>.
diff --git a/config.php.sample b/config.php.sample
new file mode 100644
index 0000000..ac09910
--- /dev/null
+++ b/config.php.sample
@@ -0,0 +1,18 @@
+<?php
+$CONFIG = array(
+  'dbtype' => 'mysql',
+  'dbname' => 'punktestand',
+  'dbhost' => 'localhost',
+  'dbuser' => 'user',
+  'dbpassword' => 'password',
+  'icon_path_format' => 'img/$SCHULJAHR/$JAHRGANG/'
+);
+
+/* Konfiguration für eine sqlite Datenbank
+ * $CONFIG = array(
+ *   'dbtype' => 'sqlite',
+ *   'dbname' => './punktestand.sqlite',
+ *   'icon_path_format' => 'img/$SCHULJAHR/$JAHRGANG/'
+ * );
+ */
+?>
diff --git a/index.css b/index.css
new file mode 100644
index 0000000..339153d
--- /dev/null
+++ b/index.css
@@ -0,0 +1,57 @@
+@media (prefers-color-scheme: dark) {
+  body {
+    background-color: #333333;
+    color: white;
+  }
+}
+
+h1, h2 {
+  text-align: center;
+  width: 100%;
+}
+
+@media (min-width: 600px) {
+  #content {
+    max-width: 1600px;
+    margin: auto;
+    display: grid;
+    grid-template-columns: minmax(600px, 2fr) 1fr;
+    grid-auto-rows: minmax(400px, auto);
+  }
+}
+
+ul {
+  list-style-type: none;
+  padding-left: 0;
+}
+
+.ereignisse-wrapper {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+li.ereignis {
+  border-radius: 5px;
+  margin: 0.5em;
+  padding: 0.5em;
+  width: 30ch;
+  border: 2px solid #666;
+}
+
+.ereignis-delta {
+  display: inline-flex;
+  border-radius: 50%;
+  width: 4ch;
+  aspect-ratio: 1 / 1;
+  padding: 2px;
+  border: 2px solid #666;
+  align-items: center;  
+  justify-content: center;
+  float:right;
+}
+
+.ereignis-beschreibung {
+  margin-top: 2px;
+  display: block;
+}
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..e37d2af
--- /dev/null
+++ b/index.js
@@ -0,0 +1,117 @@
+/**
+ *
+ * @licstart  The following is the entire license notice for the 
+ *  JavaScript code in this page.
+ *
+ * Copyright (C) 2025 Florian Fischer
+ *
+ *
+ * The JavaScript code in this page is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GNU GPL) as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option)
+ * any later version.  The code is distributed WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you
+ * may distribute non-source (e.g., minimized or compacted) forms of
+ * that code without the copy of the GNU GPL normally required by
+ * section 4, provided you include this license notice and a URL
+ * through which recipients can access the Corresponding Source.
+ *
+ * @licend  The above is the entire license notice
+ * for the JavaScript code in this page.
+ *
+ */
+
+// Zeichne das Diagramm und erstelle eine Liste aller Events,
+// wenn die Seite komplett geladen wurde
+window.onload = function() {
+  zeichne();
+  listeEvents();
+}
+
+var diagramm;
+function zeichne() {
+  // Wir haben keine Daten zum Zeichnen
+  if (!daten || !daten.klassen) return;
+
+  // Zeige den Indikator, dass das Diagramm gezeichnet wird
+  let zeichnenIndikator = document.getElementById("zeichnen");
+  zeichnenIndikator.style.display = "block";
+  let zeichenort = document.getElementById("zeichenort");
+  zeichenort['aria-busy'] = true;
+
+  const ctx = document.getElementById('zeichenflaeche');
+
+  // Verwerfe ein bereits gezeichnetes Diagramm
+  if (diagramm) diagramm.destroy();
+
+  // Erzeuge ein neues Balkendiagramm mit unseren Daten
+  chart = new Chart(ctx, {
+    type: 'bar',
+    options: {
+      animation: false, // Deaktiviere die Animation beim Zeichnen der Balken
+      plugins: {
+        legend: {
+          display: false // Wir benötigen keine Legende für den Punktestand
+        },
+        tooltip: {
+          enabled: false // Deaktiviere die Tooltips, die nur den Punktestand zeigen
+        }
+      }
+    },
+    data: {
+      // Die Klassenbezeichnungen sind unsere X-Achsen Bezeichner
+      labels: daten.klassen.map(klasse => klasse.bezeichner),
+      datasets: [
+        {
+          label: 'Punkte',
+          data: daten.klassen.map(klasse => klasse.punkte),
+          backgroundColor: daten.klassen.map(klasse => klasse.farbe)
+        }
+      ]
+    },
+  });
+
+  // Verstecke den Zeichenindikator
+  zeichnenIndikator.style.display = "none";
+  zeichenort['aria-busy'] = false;
+}
+
+// Erzeuge eine Liste aller Ereignisse.
+// Die globale Variable ereignisse muss definiert sein und ein Iterable aller
+// Ereignisse, die angezeigt werden sollen, enthalten.
+function listeEvents() {
+  let liste = document.getElementById("ereignisse");
+  for (let ereignis of daten.ereignisse) {
+    // Erzeuge ein Listenelement, das alle Infos des Ereignisses enthält
+    let ereignisNode = document.createElement("li");
+    ereignisNode.classList.add("ereignis");
+
+    // Span, das die Meta-Informationen (Klasse, Datum) eines Ereignisses enthält
+    let ereignisUrsache = document.createElement("span");
+    ereignisUrsache.innerHTML = `<b>${ereignis.Jahrgang}${ereignis.Bezeichner}</b>`
+    if (ereignis.Datum) {
+      ereignisUrsache.innerHTML += ` <small>${ereignis.Datum}</small>`
+    }
+    ereignisUrsache.classList.add("ereignis-klasse");
+    ereignisNode.appendChild(ereignisUrsache);
+
+    // Die Veränderung des Punktestands durch das Ereignis
+    let ereignisDelta = document.createElement("span");
+    ereignisDelta.innerHTML = `${ereignis.Delta}`;
+    ereignisDelta.classList.add("ereignis-delta");
+    ereignisNode.appendChild(ereignisDelta);
+
+    // Die Beschreibung des Ereignisses
+    let ereignisBeschreibung = document.createElement("span");
+    ereignisBeschreibung.innerHTML = `<i>${ereignis.Beschreibung}</i>`;
+    ereignisBeschreibung.classList.add("ereignis-beschreibung");
+    ereignisNode.appendChild(ereignisBeschreibung);
+
+    // Füge das neue Ereignis-Listenelement der Ereignis-Liste hinzu
+    liste.appendChild(ereignisNode);
+  }
+}
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..ceb9d29
--- /dev/null
+++ b/index.php
@@ -0,0 +1,71 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="de" xml:lang="de">
+<head>
+  <title>Punktestand</title>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <meta name="author" content="Florian Fischer" />
+
+  <!-- Lade den CSS Code, der das Aussehen der Seite definiert -->
+  <link rel="stylesheet" href="index.css"/>`
+
+  <!-- Lade die Daten für den Jahrgang und das Schuljahr aus der Datenbank -->
+  <?php 
+    $QUERIES = array();
+    parse_str($_SERVER['QUERY_STRING'], $QUERIES);
+
+    // TODO: Berechne das aktuelle Schuljahr
+    function aktuelles_schuljahr() {
+      return "2526";
+    }
+
+    $SCHULJAHR = $QUERIES['schuljahr'] ?? aktuelles_schuljahr();
+    $JAHRGANG = $QUERIES['jahrgang'];
+    // TODO: Behandle fehlenden jahrgangs URL query Parameter
+
+    // Lade die lokale Konfigurationsdatei, die die globale Variable $CONFIG definiert
+    require_once('config.php');
+
+    // Lade die Funktion, um die Daten aus der Datenbank zu lesen
+    require('lade_daten.php');
+
+    // Lade alle Daten aus der Datenbank mit der in lade_daten.php definierten
+    // Funktion lade_daten($config, $schuljahr, $jahrgang)
+    $daten = lade_daten($CONFIG, $SCHULJAHR, $JAHRGANG);
+
+    // Bereite die Klassen und Event Daten für Javascript vor
+    $daten_json = json_encode($daten);
+
+    // Schreibe den Javascript Code mit unseren Daten in die Webseite
+    echo "<script>";
+    echo "const daten = $daten_json;";
+    echo "</script>";
+  ?>
+
+  <!-- Lade die benötigten Javascript Dateien -->
+  <script src="js/chart.umd.js"></script>
+  <script src="js/index.js"></script>
+</head>
+
+<body>
+  <h1>Punktestand Jahrgangsstufe <?php echo "$JAHRGANG $SCHULJAHR";?></h1>
+
+  <!-- Container für den Inhalt des Punktestands -->
+  <div id="content">
+    <!-- Fortschrittsanzeige für das Zeichnen des Diagramms -->
+    <progress id="zeichnen" aria-label="Zeichnen" style="display: none;"></progress>
+    <!-- Container des Diagramms -->
+    <div id="zeichenort", aria-busy="true" aria-describedby="zeichnen">
+      <!-- Das HTML Element das zum Zeichnen des Diagramms verwendet wird -->
+      <canvas id="zeichenflaeche"></canvas>
+    </div>
+
+    <!-- Liste aller Ergeignisse -->
+    <div class="ereignisse-wrapper">
+      <h2>Ereignisse</h2>
+      <ul id="ereignisse">
+      </ul>
+    </div>
+  </div>
+</body>
+</html>
diff --git a/lade_daten.php b/lade_daten.php
new file mode 100644
index 0000000..67134be
--- /dev/null
+++ b/lade_daten.php
@@ -0,0 +1,101 @@
+<?php
+/* Copyright 2025 Florian Fischer
+ * punktestand is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * punktestand is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * punktestand. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+// Die Funktion lade_daten liefert die Klassen und ihren Punktestand, sowie alle
+// aufgetretenen Ereignisse in einem array zurück.
+function lade_daten($config, $schuljahr, $jahrgang): array {
+  // Zusätzliche Parameter neben der Datenbankbeschreibung für den PDO Konstruktor.
+  $pdo_parameter = array();
+
+  // Behandle unterschiedliche Arten von Datenbanken
+  if ($config['dbtype'] == 'sqlite') {
+    $db_beschreibung = sprintf("sqlite:%s", $config['dbname']);
+  } else {
+    $db_beschreibung = sprintf('%s:host=%s;dbname=%s', $config['dbtype'], $config['dbhost'], $config['dbname']);
+    // MySql bspw. benötigt einen Nutzernamen und ein Passwort für die Verbindung
+    array_push($pdo_parameter, $config['dbuser']);
+    array_push($pdo_parameter, $config['dbpassword']);
+  }
+
+  // Versuche die Verbindung zur Datenbank aufzubauen. Benötigte Parameter
+  // müssen in der richtigen Reihenfolge in dem $pdo_parameter array enthalten sein.
+  try {
+    $verbindung = new PDO($db_beschreibung, ...$pdo_parameter);
+  } catch(PDOException $e) {
+    // Die Verbindung ist fehlgeschlagen
+    error_log($e->getMessage());
+    return "null; alert('Es konnte keine Verbindung zur Datenbank hergestellt werden, bitte gib deiner Lehrkraft Bescheid. Fehler: " . $e->getMessage() . "')";
+  }
+
+  // Die Verbindung war erfolgreich
+
+  // PHP Klasse, die alle Daten einer Schulklasse enthält.
+  class Klasse {
+    public string $bezeichner;
+    public int $punkte;
+    public string $farbe;
+
+    public function __construct(string $bezeichner, ?string $farbe) {
+      $this->bezeichner = $bezeichner;
+      $this->punkte = 0;
+      if (is_null($farbe)) {
+        // Die Standardfarbe ist ein leichtes Blau
+        $this->farbe = 'rgb(54, 162, 235)';
+      } else {
+        $this->farbe = $farbe;
+      }
+    }
+  }
+
+  // Bereite unsere Klassenabfrage vor.
+  // Dies verhindert SQL-Injection Angriffe, da die Parameter Schuljahr und
+  // Jahrgang über die URL kontrollierbar sind.
+  $klassen_abfrage = $verbindung->prepare('SELECT * FROM Klasse WHERE Schuljahr = ? AND Jahrgang = ?');
+  $klassen_abfrage->bindValue(1, $schuljahr, PDO::PARAM_STR);
+  $klassen_abfrage->bindValue(2, $jahrgang, PDO::PARAM_INT);
+  $klassen_abfrage->execute();
+
+  // Die Klassen im passenden Jahrgang und Schuljahr
+  $klassen = array();
+  foreach ($klassen_abfrage->fetchAll() as $zeile) {
+    $bezeichner = sprintf('%d%s', $zeile['Jahrgang'], $zeile['Bezeichner']);
+    $klasse = new Klasse($bezeichner, $zeile['Farbe']);
+    // Indiziere die Klassen mit dem jeweiligen Bezeichner
+    $klassen[$bezeichner] = $klasse;
+  }
+
+  // Bereite die Ereignisabfrage vor. Sicherheitshinweis siehe: Klassenabfrage.
+  $ereignis_abfrage = $verbindung->prepare('SELECT * FROM Ereignis WHERE Schuljahr = ? AND Jahrgang = ?');
+  $ereignis_abfrage->bindValue(1, $schuljahr, PDO::PARAM_STR);
+  $ereignis_abfrage->bindValue(2, $jahrgang, PDO::PARAM_INT);
+  $ereignis_abfrage->execute();
+
+  // Alle Ereignisse der ausgewählten Klassen
+  $ereignisse = $ereignis_abfrage->fetchAll();
+
+  // Schließe die Datenbank Verbindung
+  $verbindung = null;
+
+  foreach ($ereignisse as $ereignis) {
+    $bezeichner = sprintf('%d%s', $ereignis['Jahrgang'], $ereignis['Bezeichner']);
+    // Aktualisiere den Punktestand nach dem Ereignis.
+    $klassen[$bezeichner]->punkte += $ereignis['Delta'];
+  }
+
+  $daten = array();
+  $daten['klassen'] = array_values($klassen);
+  $daten['ereignisse'] = $ereignisse;
+  return $daten;
+}
+?>
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..2a3fb6e
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,34 @@
+{
+  "name": "punktestand",
+  "version": "0.0.1",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "punktestand",
+      "version": "0.0.1",
+      "license": "ISC",
+      "dependencies": {
+        "chart.js": "^4.4.0"
+      }
+    },
+    "node_modules/@kurkle/color": {
+      "version": "0.3.4",
+      "resolved": "https://registry.npmjs.org/@kurkle/color/-/color-0.3.4.tgz",
+      "integrity": "sha512-M5UknZPHRu3DEDWoipU6sE8PdkZ6Z/S+v4dD+Ke8IaNlpdSQah50lz1KtcFBa2vsdOnwbbnxJwVM4wty6udA5w==",
+      "license": "MIT"
+    },
+    "node_modules/chart.js": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-4.5.0.tgz",
+      "integrity": "sha512-aYeC/jDgSEx8SHWZvANYMioYMZ2KX02W6f6uVfyteuCGcadDLcYVHdfdygsTQkQ4TKn5lghoojAsPj5pu0SnvQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@kurkle/color": "^0.3.0"
+      },
+      "engines": {
+        "pnpm": ">=8"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..c6a01d6
--- /dev/null
+++ b/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "punktestand",
+  "version": "0.0.1",
+  "description": "",
+  "main": "index.php",
+  "scripts": {
+    "build": "make"
+  },
+  "author": "Florian Fischer",
+  "license": "ISC",
+  "dependencies": {
+    "chart.js": "^4.4.0"
+  }
+}
diff --git a/scripts/erzeuge_jahrgang.py b/scripts/erzeuge_jahrgang.py
new file mode 100755
index 0000000..c9380bd
--- /dev/null
+++ b/scripts/erzeuge_jahrgang.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+"""Erzeuge SQL Statements um die Klassen eines Jahrgangs anzulegen"""
+import argparse
+
+STATEMENT = "INSERT INTO Klasse (Schuljahr, Jahrgang, Bezeichner) VALUES ('{}', {}, '{}');"
+
+
+def erzeuge_statements(schuljahr: str, klassenstufe: int, bezeichner: str) -> list[str]:
+    """Gib eine Liste an SQL Statements zurück, um alle Klassen eines Jahrgangs zu erzeugen"""
+    statements = []
+    aktueller_bezeichner = 'a'
+
+    while aktueller_bezeichner <= bezeichner:
+        statement = STATEMENT.format(schuljahr, klassenstufe, aktueller_bezeichner)
+        statements.append(statement)
+        aktueller_bezeichner = chr(ord(aktueller_bezeichner) + 1)
+
+    return statements
+
+
+def main():
+    """Erzeuge passenden Statements zu den Kommandozeilen-Parameter"""
+    parser = argparse.ArgumentParser()
+    parser.add_argument("schuljahr",
+                        type=str,
+                        help="Das Schuljahr in der Form: yyYY")
+    parser.add_argument("klassenstufe",
+                        type=int,
+                        help="Die Klassenstufe der zu erzeugenden Klassen")
+    parser.add_argument("letzter_bezeichner",
+                        type=str,
+                        help="Der letzte alphabetische Bezeichner der Klassen")
+    args = parser.parse_args()
+
+    for statement in erzeuge_statements(args.schuljahr, args.klassenstufe, args.letzter_bezeichner):
+        print(statement)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/sql/dummydata.sql b/sql/dummydata.sql
new file mode 100644
index 0000000..410a3ea
--- /dev/null
+++ b/sql/dummydata.sql
@@ -0,0 +1,3 @@
+INSERT INTO Ereignis (Jahrgang, Bezeichner, Schuljahr, Datum, Delta, Beschreibung) VALUES (7, 'a', '2526', '2025-09-21 10:32:17', 10, 'Aufpassen');
+INSERT INTO Ereignis (Jahrgang, Bezeichner, Schuljahr, Delta, Beschreibung) VALUES (7, 'a', '2526', -2, 'Nerven');
+INSERT INTO Ereignis (Jahrgang, Bezeichner, Schuljahr, Delta, Beschreibung) VALUES (7, 'b', '2526', 5, 'Quizzen');
diff --git a/sql/init.sql b/sql/init.sql
new file mode 100644
index 0000000..44e3288
--- /dev/null
+++ b/sql/init.sql
@@ -0,0 +1,22 @@
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE Klasse (
+  Schuljahr TEXT,
+  Jahrgang INTEGER,
+  Bezeichner TEXT,
+  Farbe TEXT,
+  PRIMARY KEY(Schuljahr, Jahrgang, Bezeichner)
+);
+
+CREATE TABLE Ereignis (
+  Id INTEGER,
+  Schuljahr TEXT NOT NULL,
+  Jahrgang INTEGER NOT NULL,
+  Bezeichner TEXT NOT NULL,
+  Datum DATETIME,
+  Delta INTEGER NOT NULL,
+  Beschreibung TEXT,
+  PRIMARY KEY(Id AUTOINCREMENT),
+  FOREIGN KEY(Schuljahr, Jahrgang, Bezeichner)
+    REFERENCES Klasse(Jahrgang, Bezeichner, Klasse)
+);