body #loading-area {
    display: none;
    position: fixed;
    top: 0px;
    left: 0px;
    height: 100%;
    width: 100%;
    z-index: 9999;
    background-color: transparent;
}

body #loading-area > img {
    position: absolute;
    transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
}