.cm_loader {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: url('https://media1.tenor.com/images/8ac12962c05648c55ca85771f4a69b2d/tenor.gif?itemid=9212724') 50% 50% no-repeat white;
    background-size: 10%;
}