body {
    margin: 0;
    padding: 0;
}

#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
}

    #preloader .center {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    #preloader span {
        position: absolute;
        width: 20px;
        height: 20px;
        background: #262626;
        animation: animate 4s infinite ease-in-out;
    }

        #preloader span:nth-child(1) {
            background-color: #6096FD;
            left: -24px;
            top: -24px;
            animation-delay: .2s;
        }

        #preloader span:nth-child(2) {
            background-color: #AAB6FB;
            left: 0;
            top: -24px;
            animation-delay: .4s;
        }

        #preloader span:nth-child(3) {
            background-color: #FB7B8E;
            left: -24px;
            top: 0;
            animation-delay: .6s;
        }

        #preloader span:nth-child(4) {
            background-color: #FAA7B8;
            left: 0;
            top: 0;
            animation-delay: .8s;
        }

@keyframes animate {
    0% {
        transform: rotateY(0deg);
    }

    20% {
        transform: rotateY(360deg);
    }

    40% {
        transform: rotateX(180deg);
    }

    60% {
        transform: rotateX(0deg);
    }

    80% {
        transform: rotateX(360deg);
    }

    100% {
        transform: rotateY(180deg);
    }
}