html, body {
  margin: 0;
  padding: 0;
  background: black;
  overflow: hidden;
  height: 100%;
  font-family: monospace;
  color: #00ff00;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #00ff00;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 2s ease-in-out;
  text-shadow: 0 0 10px #00ff00;
}