#loader {
    position: fixed;
    top: 0;
    z-index: 999;
    height: 100vh;
    width: 100vw;
    display: block;
    background: rgb(255,255,255,.5);
    background-position: center;
    background-image: url("../img/loading.gif");
    background-repeat: no-repeat;
    background-size:200px;
    display: none;
}