.loader {
    position: fixed;
    top: 0;
    left: 0;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-flow: column nowrap;
    width: 100%;
    height: 100vh;
    z-index: 999999;
    background: #fff;
}

.loader .animation {
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 50px;
}

.loader .animation .dot {
    width: 20px;
    height: 20px;
    display: inline-block;
    background: #ccc;
    border-radius: 50px;
    position: relative;
    top: 0;
    animation: anim .5s infinite;
    margin: 5px;
}

.loader .animation .dot:nth-child(2) {
    animation-delay: .1s;
    background: #b5b5b5;
}

.loader .animation .dot:nth-child(3) {
    animation-delay: .2s;
    background: #9e9e9e;
}

@keyframes anim {
    0%, 100% {
        top: 0;
    }

    50% {
        top: -20px;
    }
}