body {
	margin: 0;
	padding: 0;
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100%;
	overflow: hidden;
	background-color: #F4F4F5;
	/* background-image:
      linear-gradient(45deg, #cccccc 25%, transparent 25%), 
      linear-gradient(135deg, #ccc 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #ccc 75%),
      linear-gradient(135deg, transparent 75%, #ccc 75%);
    background-size:25px 25px; /* Must be a square */
    /* background-position:0 0, 12.5px 0, 12.5px -12.5px, 0px 12.5px; Must be half of one side of the square */
  }
  
  #canvas-container {
	width: 100%;
	height: 100%;
  }
  