body {
    font-family: Helvetica sans-serif;
    padding: 0;
    margin: 0;
    background-color: rgb(0, 0, 0);
    -webkit-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgb(0, 0, 0);
}