html,
body {
  margin: 0;
  padding: 0;
  color: #ccc;
  background: #000;
  text-align: center;
}

canvas {
  display: block;
  margin: 0 auto;
  margin-top: 15vh
}

div#msg {
  color: green;
  font-size: 25px;
  font-family: Impact, Charcoal, sans-serif;
  margin-top: 15px;
}