* {
    margin:0;
    padding:0;
    }
#maindiv {
    position: relative;
    }    
body {
    background-color:black;
    }
canvas {
    display:block;
    position: absolute;
    left: 0;
    top: 0;    
    }
#Canvas0 {
    z-index: 0;}
#Canvas1 {
    z-index: 1;}
#Canvas2 {
    z-index: 2;}