#preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 1200;
}

#mask-cover {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 99
}

#square span {
    width: 16px;
    height: 16px;
    background-color: #000;
    display: inline-block
}

#square span {
    display: inline-block
}

#square span {
    background-color: #000
}

#square {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    height: 50px;
    width: 50px;
    margin: -25px 0 0 -25px
}

#square span:nth-child(1) {
    left: 11px;
    -webkit-animation-delay: .2s;
    animation-delay: .2s;
    background: #87509C;
}

#square span:nth-child(2) {
    left: 22px;
    -webkit-animation-delay: .4s;
    animation-delay: .4s;
    background: #87509C;
}

#square span:nth-child(3) {
    left: 33px;
    -webkit-animation-delay: .6s;
    animation-delay: .6s;
    background: #87509C;
}

#square span:nth-child(4) {
    left: 44px;
    -webkit-animation-delay: .8s;
    animation-delay: .8s;
    background: #87509C;
}

#square span {
    -webkit-animation: square 1.7s infinite ease-in-out both;
    animation: square 1.7s infinite ease-in-out both
}

@keyframes square {
    0%,
    100%,
    80% {
        -webkit-transform: scale(0);
        transform: scale(0);
        opacity: 0
    }
    40% {
        -webkit-transform: scale(1);
        transform: scale(1);
        opacity: 1
    }
}

@-webkit-keyframes square {
    0%,
    100%,
    80% {
        -webkit-transform: scale(0);
        transform: scale(0);
        opacity: 0
    }
    40% {
        -webkit-transform: scale(1);
        transform: scale(1);
        opacity: 1
    }
}