html, body {
  margin: 0;
  padding: 0;
  background: #000;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}
canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}