.loader {
    position: absolute;
    top: 50%;
    left: 0;
    margin: 0 auto;
    width: 100%;
    height: 20px;
    text-align: center;
    z-index: 1;
}


.loader > div{
    content: " ";
    width: 10px;
    height: 10px;
    background: #B3B4B4;
    border-radius: 100%;
    -webkit-animation: shift 3s linear infinite;
    animation: shift 3s linear infinite;
    display: inline-block;
    margin: 0 5px;
}

    .loader > div:first-child {
        margin-left: 0;
    }

    .loader > div:last-child {
        margin-right: 0;
    }

    .loader > div:nth-of-type(1) {
        -webkit-animation-delay: .2s;
        animation-delay: .2s;
    }

    .loader > div:nth-of-type(2) {
        -webkit-animation-delay: .4s;
        animation-delay: .4s;
    }

    .loader > div:nth-of-type(3) {
        -webkit-animation-delay: .6s;
        animation-delay: .6s;
    }

    .loader > div:nth-of-type(4) {
        -webkit-animation-delay: .8s;
        animation-delay: .8s;
    }

    .loader > div:nth-of-type(5) {
        -webkit-animation-delay: 1s;
        animation-delay: 1s;
    }

    .loader > div:nth-of-type(6) {
        -webkit-animation-delay: 1.2s;
        animation-delay: 1.2s;
    }

    .loader > div:nth-of-type(7) {
        -webkit-animation-delay: 1.4s;
        animation-delay: 1.4s;
    }

    .loader > div:nth-of-type(8) {
        -webkit-animation-delay: 1.6s;
        animation-delay: 1.6s;
    }

    .loader > div:nth-of-type(9) {
        -webkit-animation-delay: 1.8s;
        animation-delay: 1.8s;
    }

    .loader > div:nth-of-type(10) {
        -webkit-animation-delay: 2s;
        animation-delay: 2s;
    }

    .loader > div:nth-of-type(11) {
        -webkit-animation-delay: 2.2s;
        animation-delay: 2.2s;
    }

    .loader > div:nth-of-type(12) {
        -webkit-animation-delay: 2.4s;
        animation-delay: 2.4s;
    }

    .loader > div:nth-of-type(13) {
        -webkit-animation-delay: 2.6s;
        animation-delay: 2.6s;
    }

    .loader > div:nth-of-type(14) {
        -webkit-animation-delay: 2.8s;
        animation-delay: 2.8s;
    }

    .loader > div:nth-of-type(15) {
        -webkit-animation-delay: 3s;
        animation-delay: 3s;
    }

@-webkit-keyframes shift {
    from {
        background: #B3B4B4;
    }

    to {
        background: #1763AE;
    }
}

@keyframes shift {
    from {
        background: #B3B4B4;
    }

    to {
        background: #1763AE;
    }
}

.blockdiv {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    background-color: #000;
    opacity: 0.3;
}