.canvas_div{
	position:fixed;
	top:0;left:0;right: 0;
	margin: 0 auto;
	width: 100vw;height: 100vh;
	z-index: 2;
}
#myCanvas{
	border: 2px solid #FFF;
	position:absolute;
	top:0;left:0;right: 0;
	margin: 0 auto;
	width: 100vw;height: 100vh;
	z-index: 3;
}
@media screen and (max-width: 1900px) {

}