.carousel-item {
    background-color: #000;
}

.carousel .loading{
    width:46px;
    height:46px;
    position:absolute;
    top:50%;
    left:50%;
    background:#000 url(../img/ajax-loader.gif) no-repeat center center;
    margin:-23px 0 0 -23px;
    z-index:100;
    border-radius:10px;
    opacity:0.7;
}