#loading_indicator{
    position: fixed;
    width: 100%;
    height: 100%;
    opacity: 0;
    background-color: #fff;
    overflow: hidden;
    z-index: -9999;
}
#loading_indicator.show {

    z-index: 999999;
    opacity: 1;

}

#loading_indicator .arc:before {
    -webkit-animation: spin 0.5s infinite linear;
    animation: spin 0.5s infinite linear;
    border-radius: 100%;
    border-top: 6px solid #222222;
    content: '';
    height: 50px;
    width: 50px;
    position: absolute;
    top: 50%;
    left: 50%;
}

@-webkit-keyframes spin {
    to {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spin {
    to {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}