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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #292828;
    animation: colorchanger 4s linear infinite;
}

@keyframes colorchanger {
    0%, 100% {
        filter: hue-rotate(270deg);
    }
    50% {
        filter: hue-rotate(360deg);
    }
}

.container {
    position: relative;
    width: 400px;
    height: 100px;
    transform-style: preserve-3d;
    animation: anim 4s linear infinite;
}

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

.container .box {
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.container .box span{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(21, 21, 25, 1), rgba(255, 6, 6, 1));
    transform-style: preserve-3d;
    transform: rotateY(calc(90deg * var(--i))) translateZ(200px);
}

.top {
    position: absolute;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    background: #222;
    transform-style: preserve-3d;
    transform:  rotateX(90deg) translateZ(200px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.top::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    background-color: rgba(255, 6, 6, 1);
    transform: translateZ(-250px);
    opacity: 0.75;
    box-shadow: 0 0 120px rgba(255, 6, 6, 0.2),
    0 0 200px rgba(255, 6, 6, 0.4),
    0 0 300px rgba(255, 6, 6, 0.6),
    0 0 400px rgba(255, 6, 6, 0.8),
    0 0 500px rgba(255, 6, 6, 1);
}

.icon {
    position: absolute;
    font-size: 15em;
    color: rgba(255, 6, 6, 1);
    text-shadow: 0 0 50px rgba(255, 6, 6, 0.25),
    0 0 100px rgba(255, 6, 6, 0.5),
    0 0 200px rgba(255, 6, 6, 0.75),
    0 0 300px rgba(255, 6,6,1);
}

.icon:hover{
    transform: scale(1.1);
}

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