html,
body {
	margin: 0;
	padding: 0;
}

canvas {
	display: block;
}
body {
	position: relative;
}
div {
	position: absolute;
	top: 50%;
	left: 5%;
	transform: translateY(-50%);
	height: 500px;
	width: 400px;
	overflow: scroll;
	padding: 0 0 0 50px;
	padding: 0;
	border-radius: 10px;
}
h1 {
	color: #fff;
	padding: 0;
	margin: 0;
}
pre {
	margin: 0;
	padding: 0;
}
code {
	border-radius: 10px;
}
canvas {
	z-index: -999999;
}