index.css

body {
    margin: 0px;
    padding: 100px 0px;
    background-color: #F7E8ED;
    transition:background-color 0.2s linear;
}

.wrapper {
    width: 1190px;
    margin: 0px auto;
    perspective: 1000px;
    transform-style:preserve-3d;
}

.wrapper .inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    transform-style: preserve-3d;
}

.wrapper .inner .item {
    width: 150px;
    height: 150px;
    margin: 12px 0px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.4s ease-in-out;
}

.wrapper .inner .item div {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0px;
    top: 0px;
    background: url('./images/1.png') no-repeat center center;
    background-color: #f44336;
    border: 10px solid rgba(0, 0, 0, .1);
    box-sizing: border-box;
}

.wrapper .inner .item.top {
    transform: translateZ(75px) rotatex(-180deg);
}

.wrapper .inner .item.bottom {
    transform: translateZ(75px) rotatex(180deg);
}

.wrapper .inner .item.left {
    transform: translateZ(75px) rotatey(180deg);
}

.wrapper .inner .item.right {
    transform: translateZ(75px) rotatey(-180deg);
}

.wrapper .inner .item div:nth-child(1) {
    font-size: 35px;
    color: #fff;
    font-weight: bold;
    line-height: 150px;
    text-align: center;
    transform: translateZ(75px);
}

.wrapper .inner .item div:nth-child(2) {
    transform: translateZ(-75px);
}

.wrapper .inner .item div:nth-child(3) {
    transform: rotatex(90deg) translateZ(75px);
}

.wrapper .inner .item div:nth-child(4) {
    transform: rotatex(-90deg) translateZ(75px);
}

.wrapper .inner .item div:nth-child(5) {
    transform: rotatey(90deg) translateZ(75px);
}

.wrapper .inner .item div:nth-child(6) {
    transform: rotatey(-90deg) translateZ(75px);
}