html, body {
  margin: 0;
  padding: 0;
  background-color: black;
}

canvas {
  position: fixed;
  top: 0;
  display: block;
}


div {
  width: 100%;
  text-align: center;
  height: 100vh;
  line-height: 100vh;
  vertical-align: middle;
  font-family: monospace;
  font-size: 16px;
  color: white;
}