body {
  margin: 0 auto;
  width: 500px;
  color: white;
  background-color: black;
}

h1 {
  text-align: center;
  font-family: sans-serif;
}

canvas {

  width: 100%;
  height: 100%;
}

p {
  text-align: center;
}

a {
  color: white;
}

a:hover {
  color: gray;
}