bubbles/index.html

<style>
html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: black;
}
</style>
<canvas id="canvas"></canvas>
<script>
  var Module = {
    canvas: document.getElementById("canvas")
  };
</script>
<script src="bubbles.js"></script>