html,
body {
	background-color: #686b54;
	margin: 0;
	padding: 0;
	div{ 
 		width:100%; 
 		height:100vh; 
 		position:relative; 
	} 
	canvas{ 
 		position:absolute; 
 		top:0;bottom:0;right:0;left:0; 
 		margin:auto; 
	} 
}