html, body {
  margin: 0;
  padding: 0;
    background: #000;
}
canvas {
  display: block;
  image-rendering: optimizeSpeed;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: optimize-contrast;
  -ms-interpolation-mode: nearest-neighbor;
}