.grey-background{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background: #000;
    opacity:.70;
    -moz-opacity: 0.7;
    filter: alpha(opacity=70);
    display:flex;
    flex-wrap: wrap;
    align-content: center;
}
.lds-spinner {
    color: official;
    display: flex;
    position: relative;
    width: 80px;
    height: 80px;
    margin:0 auto;
}
.lds-spinner div {
    transform-origin: 45px 90px;
    animation: lds-spinner 1.2s linear infinite;
}
.lds-spinner div:after {
    content: " ";
    display: flex;
    position: absolute;
    top: 0px;
    left: 35px;
    width: 15px;
    height: 45px;
    border-radius: 20%;
    background: #fff;
    box-sizing: border-box;
}
.lds-spinner div:nth-child(1) {
    transform: rotate(0deg);
    animation-delay: -1.1s;
}
.lds-spinner div:nth-child(2) {
    transform: rotate(30deg);
    animation-delay: -1s;
}
.lds-spinner div:nth-child(3) {
    transform: rotate(60deg);
    animation-delay: -0.9s;
}
.lds-spinner div:nth-child(4) {
    transform: rotate(90deg);
    animation-delay: -0.8s;
}
.lds-spinner div:nth-child(5) {
    transform: rotate(120deg);
    animation-delay: -0.7s;
}
.lds-spinner div:nth-child(6) {
    transform: rotate(150deg);
    animation-delay: -0.6s;
}
.lds-spinner div:nth-child(7) {
    transform: rotate(180deg);
    animation-delay: -0.5s;
}
.lds-spinner div:nth-child(8) {
    transform: rotate(210deg);
    animation-delay: -0.4s;
}
.lds-spinner div:nth-child(9) {
    transform: rotate(240deg);
    animation-delay: -0.3s;
}
.lds-spinner div:nth-child(10) {
    transform: rotate(270deg);
    animation-delay: -0.2s;
}
.lds-spinner div:nth-child(11) {
    transform: rotate(300deg);
    animation-delay: -0.1s;
}
.lds-spinner div:nth-child(12) {
    transform: rotate(330deg);
    animation-delay: 0s;
}
@keyframes lds-spinner {
    0% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}