* {
    margin: 0;
    padding: 0;
    border: 0;
    background: #000000;
    overflow: hidden;
}


canvas {
    position: relative;
    top: 10%;
    left: 50%;
    margin-left: -100vmin;
    margin-top: -50vmin;
    width: 200vmin;
    height: 200vmin;
    overflow: hidden;
    display: block;
}