html, body {
  background: #000000;
  color: #ffffff;
  height: 100%;
}

body {
  display: flex;
  overflow: hidden;
}
body canvas {
  width: 100%;
  height: 100%;
  max-width: 500px;
  max-height: 300px;
  background: #000;
  margin: auto;
  -webkit-filter: blur(3px) contrast(20);
          filter: blur(3px) contrast(20);
}