* {
    margin: 0;
    padding: 0;
}

section {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;

}

.pattern {
    position: relative;
    transform-style: preserve-3d;
    perspective: 1000px;
    animation: animateBg 10s ease-in-out infinite;

}
@keyframes animateBg{
    0%,100%{
        transform: scale(1.6) rotate(-15deg);
    }
    50%{
        transform: scale(1.6) rotate(15deg);
    }
    
}

.pattern .face {
    position: relative;
    width: 100%;
    height: 50vh;
    background: url(check.png);
    background-size: 100px, 100px;
    animation: animate 1s linear infinite;
}
@keyframes animate {
    0%{
        background-position: 0;
    }
    100%{
        background-position: 100px;
    }
}

.pattern .face.face2 {
    height: 120vh;
    transform-origin: top;
    transform: rotateX(70deg);

}

.pattern .face1:before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 125px;
    background: linear-gradient(0deg, rgba(0,0,0,.5),transparent);
}

.pattern .face2:before {
    content: "";
    position: absolute;
    bottom: top;
    left: 0;
    width: 100%;
    height: 125px;
    background: linear-gradient(180deg, rgba(0,0,0,.5),transparent);
}