html {
     background: black;
     width: 100%;
     height:100%;
     min-height:100%;
}
body {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-image: url("img/pageBG.png");
    background-size:     cover;
    background-repeat:   no-repeat;
    background-position: center center;
}
canvas {
    box-shadow: 0px 0px 40px #000000;
}