#indicator {
    width: 100%;
    height: 400px;

    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    z-index: 100;
}

#indicator img {

    position: absolute;
    top: 50%;
    left: 50%;
    margin: -50px 0 0 -50px;

}