#clock-container {
    position: absolute;
    height: 256px;
    width: 256px;
    left:50%;
    top: 50%;
    margin: -128px 0 0 -128px;
}

#clock-container img {
    position: absolute;
}

#hour-hand {
    height: 256px;
    width: 12px;
    left: 50%;
    margin: 0 0 0 -4.5px;
}

#minute-hand {
    height: 256px;
    width: 9px;
    left:50%;
    margin: 0 0 0 -6px;
}

#second-hand {
    height: 256px;
    width: 6px;
    left: 50%;
    margin: 0 0 0 -3px;
}