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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #222;
}

.cube {
  position: absolute;
  width: 300px;
  height: 300px;
}

.cube div {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: animate 6s linear infinite;
}

@keyframes animate {
  0% {
    transform: rotateX(-20deg) rotateY(360deg);
  }

  100% {
    transform: rotateX(-20deg) rotateY(0deg);
  }
}

.cube div.big span {
  position: absolute;
  top: 80px;
  width: 300px;
  height: 300px;
  background: var(--clr);
  transform: rotateY(calc(90deg * var(--i))) translateZ(150px);
  transform-style: preserve-3d;
  transition: 0.5s;
}

.cube:hover div.big span {
  background: transparent;
  border: 10px solid #ffa20d;
  filter: drop-shadow(0 0 20px #ffa20d);
}

.cube div.big span.top {
  transform: rotateX(90deg) translateZ(150px);
}

.cube div.big span.top::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateZ(-350px);
  background: rgba(0, 0, 0, 0.5);
  filter: blur(50px);
}

.cube2 {
  position: absolute;
  width: 300px;
  height: 300px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 350px);
}

.cube2 div {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: animate2 6s linear infinite;
  scale: 0.5;
}

@keyframes animate2 {
  0% {
    transform: rotateX(-20deg) rotateY(0deg);
  }

  100% {
    transform: rotateX(-20deg) rotateY(360deg);
  }
}

.cube2 div.big span {
  position: absolute;
  top: 80px;
  width: 300px;
  height: 300px;
  background: var(--clr);
  transform: rotateY(calc(90deg * var(--i))) translateZ(150px);
  transform-style: preserve-3d;
  transition: 0.5s;
}

.cube:hover ~ .cube2 div.big span {
  background: transparent;
  border: 10px solid #fff;
  filter: drop-shadow(0 0 20px #fff);
}

.cube2 div.big span.top {
  transform: rotateX(90deg) translateZ(150px);
}

.cube2 div.big span.top::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateZ(-350px);
  background: rgba(0, 0, 0, 0.35);
  filter: blur(50px);
}