canvas {
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
}
button {
    position:fixed;
    bottom:0;
    right:0;
    width:50%;
	height:8%;
	font-size: 30px;
	touch-action: manipulation;
}
select {
    position:fixed;
    bottom:0;
    left:0;
    width:50%;
	height:8%;
	font-size: 30px;
	touch-action: manipulation;
	text-align-last: center;
}