#loading-cover {
    position: fixed;
    z-index: 100000000;
    top: 0px;
    left: 0px;
    height: 100%;
    width: 100%;
    background-color: #000000aa;
    text-align: center;
    padding: 20%;
    display: none;
}
#loading-cover img {
    height: 100px;
    width: 100px;
}