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

body,
html {
  display: gird;
  place-content: center;
  height: 100vh;
  background-color: #111;
}

.container {
  transform-style: preserve-3d;
  transform: rotateX(45deg) rotateZ(45deg) translateX(50%) translateY(-50%);
  width: 300px;
}

.cube {
  --size: 3rem;
  --offset: calc(var(--size) * -1);
  --duration: 3600ms;
  --delay: calc(var(--i) * -0.0335s);
  --ease: cubic-bezier(0.84, 0, 0.2, 1);
  position: relative;
  width: var(--size);
  height: var(--size);
  margin: 1rem;
  background-color: var(--bg-color);
  box-shadow: inset rgba(black, 0.15) -0.5rem 0.5rem 1rem;
  transform-style: preserve-3d;
  transform-origin: 50% 100% var(--offset);
  transition-property: transform, background-color;
  transition-timing-function: ease-out;
  animation: animate var(--duration) var(--delay) var(--ease) alternate infinite,
    color calc(var(--duration) * 2) var(--delay) var(--ease) infinite;
}

.cube:nth-child(odd) {
  --bg-color: #d16666;
}

.cube:nth-child(even) {
  --bg-color: #f8f52a;
}

.cube:nth-child(3n) {
  --bg-color: #405ff7;
}

.cube::before,
.cube::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: inherit;
  box-shadow: inherit;
  transform-origin: 100% 100%;
}

.cube::before {
  transform: translateZ(var(--offset)) rotateY(90deg);
  filter: brightness(120%);
}

.cube::after {
  transform: translateZ(var(--offset)) rotateX(-90deg);
  filter: brightness(80%);
}

@keyframes animate {
  0% {
    transform: scaleX(4);
  }

  20% {
    transform: scaleX(0.5) scaleY(0.6) scaleZ(0.5);
  }

  40% {
    transform: scaleX(1) scaleY(0.8) scaleZ(4);
  }
  60% {
    transform: scaleX(4) scaleY(0.6) scaleZ(4);
  }

  80% {
    transform: scaleX(4) scaleZ(1) translateY(calc(var(--size) * 2));
  }

  100% {
    transform: scaleX(1) scaleY(0.5) scaleZ(1)
      translateY(calc(var(--size) * -2));
  }
}

@keyframes color {
  42% {
    background-color: var(--bg-color);
  }

  48%,
  64% {
    background-color: #fff;
  }

  66% {
    background-color: var(--bg-color);
  }
}