body {
    margin: 0px 0px 0px 0px;
    background: #000;
}

#loading {
    width: 80px;
    height: 80px;
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -40px;
    margin-left: -40px;
    z-index: 100;
}