*{
    margin: 0;
  }
  .wrapper{
    width: 100%;
    height: 100%;
  }
  body{
    background-color: #222222;
  }
  canvas#myCanvas {
    filter: url(#filter);
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }