Update index.html

index.html

@@ -10,6 +10,15 @@
 <body>
   <div id="map"></div>
 
+  <div id="controls">
+    <label><input type="checkbox" value="subway" checked> U-Bahn</label>
+    <label><input type="checkbox" value="suburban" checked> S-Bahn</label>
+    <label><input type="checkbox" value="regional" checked> Regio</label>
+    <label><input type="checkbox" value="express" checked> Fernzüge</label>
+    <label><input type="checkbox" value="tram" checked> Tram</label>
+    <label><input type="checkbox" value="bus" checked> Bus</label>
+  </div>
+
   <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
   <script src="app.js"></script>
 </body>