#loading {
    position: absolute;
    background-color: #FFF;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

#loading_bg {
    background-color: rgba(0, 0, 0, 0.7);
}

.loader {
    width: 250px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    font-family: helvetica, arial, sans-serif;
    text-transform: uppercase;
    font-weight: 900;
    color: rgba(0, 0, 0, 0.5);
    letter-spacing: 0.2em;
}

.loader::before,
.loader::after {
    content: "";
    display: block;
    width: 15px;
    height: 15px;
    background:rgba(0, 0, 0, 0.5);
    position: absolute;
    -webkit-animation: load .7s infinite alternate ease-in-out;
    animation: load .7s infinite alternate ease-in-out;
}

.loader::before {
    top: 0;
}

.loader::after {
    bottom: 0;
}

@-webkit-keyframes load {
    0% {
        left: 0;
        height: 30px;
        width: 15px;
    }

    50% {
        height: 8px;
        width: 40px;
    }

    100% {
        left: 235px;
        height: 30px;
        width: 15px;
    }
}

@keyframes load {
    0% {
        left: 0;
        height: 30px;
        width: 15px;
    }

    50% {
        height: 8px;
        width: 40px;
    }

    100% {
        left: 235px;
        height: 30px;
        width: 15px;
    }
}