* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #333;
    height: 100vh;
}

.cube {
    position: relative;
    width: 300px;
    height: 300px;
    transform: rotateX(-30deg);
    animation: spin linear 4s infinite;
}

.cube,
.cube .wrap,
.cube .top {
    position: absolute;
    transform-style: preserve-3d;
}

.cube .wrap,
.cube .wrap .face {
    position: absolute;
    inset: 0;
}

.cube .wrap .face {
    background: linear-gradient(#333, #0f0);
    transform: rotateY(calc(90deg * var(--i))) translateZ(149px);
}

.cube .top {
    background: #333;
    transform: rotateX(90deg) translateZ(150px);
}

.cube .top,
.cube .top::before {
    position: absolute;
    top: 0;
    left: 0;
    width: 300px;
    height: 300px;
}

.cube .top::before {
    content: '';
    background: #0f0;
    transform: translateZ(-380px);
    filter: blur(20px);
    box-shadow: 0 0 120px rgba(0, 255, 0, 0.2), 0 0 200px rgba(0, 255, 0, 0.4),
        0 0 300px rgba(0, 255, 0, 0.6), 0 0 400px rgba(0, 255, 0, 0.8),
        0 0 500px lime;
}

@keyframes spin {
    0% {
        transform: rotateX(-30deg) rotateY(0deg);
    }
    100% {
        transform: rotateX(-30deg) rotateY(360deg);
    }
}