html, body {
	height: 100%;
	background-color: #ffffff;
  }
  
  body {
	margin: 0;
	display: flex;
  
	/* This centers our sketch horizontally. */
	justify-content: center;
  
	/* This centers our sketch vertically. */
	align-items: center;
  }
  
  canvas {
	margin: 0;
	padding: 0;
	display: block;
  }