.centerlize {
    margin: 0 auto;
    width: 100%;

    max-width: 600px;
    padding: 0 15px;
    box-sizing: border-box;
}

#myCanvas {
    display: block;
    margin: 0 auto;
    width: 100%;
    height: auto;
    max-width: 588px;
    background: #000;
    width: 100%;
    height: auto;
}