body {
  margin: 0;
  background-color: #000;
  color: #FFFF00;
  font-family: Arial, sans-serif;
  text-align: center;
}

h1 {
  color: #AA00FF;
  margin-top: 20px;
}

canvas {
  background-color: #000;
  display: block;
  margin: 20px auto;
  border: 2px solid #800080;
}