body {
  margin: 0;
  background: #4ec0ca;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

canvas {
  background: #70c5ce;
  border: 4px solid white;
  box-shadow: 0 0 25px rgba(0,0,0,0.4);
}