body {
  margin: 0;
}
body > strong {
  position: absolute;
  font-size: 5vw;
  color: white;
  z-index: 50;
  text-align: center;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  font-family: monospace;
  height: 1em;
  line-height: 1em;
}
canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  cursor: none;
  z-index: 1;
}