#canvas {
    position: relative;

    background-color: black;
    height: 600px;
    margin: 0 auto;
    overflow: hidden;
    width: 1000px;
}

#canvas * {
    position: absolute;

    transition-timing-function: linear;
}

#canvas img {
    display: block;
}

#start {
    left: 50%;
    top: 50%;

    z-index: 20;

    -webkit-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
}