my index.html
<body>
  <div id='game'>
    <img src='images/scenes/1.jpg' id='scene'>
    <img src='images/shapes/red.jpg' id='red' class='item'>
    <img src='images/shapes/orange.png' id='orange' class='item'>
    <img src='images/shapes/yellow.jpg' id='yellow' class='item'>
    <img src='images/shapes/green.png' id='green' class='item'>
    <img src='images/shapes/blue.png' id='blue' class='item'>
    <img src='images/shapes/indigo.png' id='indigo' class='item'>
    <img src='images/shapes/violet.jpg' id='violet' class='item'>
  </div>
  <script>
    set_scene(1);
  </script>
</body>