html {
    height: 100%;
}

body {
    padding: 0;
    margin: 0;
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100%;
}

canvas {
    background: black;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}