html, body {
	margin: 0;
	padding: 0;
	font-family: Arial;
	font-size: 12px;
	overflow: hidden;
	-webkit-text-size-adjust: none; /* important, or your text resizes randomly on rotation! */
}

p {
	margin: 0;
	padding: 1em;
	padding-bottom: 0;
}

#checker-bl, #checker-tr {
	position: absolute;
	width: 50%;
	height: 50%;
}

#checker-bl {
	position: absolute;
	background: blue;
	bottom: 0;
	left: 0;
}

#checker-tr {
	position: absolute;
	background: red;
	top: 0;
	right: 0;
}

#orientationlock {
	position: absolute;
	z-index: 1000;
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;
	background: #000;
	color: #fff;
	text-shadow: 1px 1px 0px #000;
	font-size: 2em;
	text-align: center;
	display: none;
}

#orientationlock  img{
	position: absolute;
   top: 50%;
   left: 50%;
   width: 100%;
   margin-top: -50%; /* Half the height */
   margin-left: -50%; /* Half the width */
}

canvas {
	background: #eee;
	position: absolute;
	left: 0;
}