.g-container {
  display: inline-block;
  vertical-align: middle;
  perspective: 4px;
  perspective-origin: 50% 50%;
  position: relative;
  animation: hueRotate 21s infinite linear;
}

.g-group {
  position: absolute;
  /*   perspective: 4px; */
  width: 1000px;
  height: 1000px;
  left: -500px;
  top: -500px;
  transform-style: preserve-3d;
  animation: move 12s infinite linear;
  animation-fill-mode: forwards;
}

.g-group:nth-child(2) {
  animation: move 12s infinite linear;
  animation-delay: -6s;
}

.g-item {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url('../../../../../public/start-background.jpeg');
  background-size: cover;
  opacity: 1;
  animation: fade 12s infinite linear;
  animation-delay: 0;
}

.g-group:nth-child(2) .g-item {
  animation-delay: -6s;
}

.item-right {
  transform: rotateY(90deg) translateZ(500px);
}

.item-left {
  transform: rotateY(-90deg) translateZ(500px);
}

.item-top {
  transform: rotateX(90deg) translateZ(500px);
}

.item-bottom {
  transform: rotateX(-90deg) translateZ(500px);
}

.item-middle {
  transform: rotateX(180deg) translateZ(1000px);
}

@keyframes move {
  0% {
    transform: translateZ(-500px) rotate(0deg);
  }
  100% {
    transform: translateZ(500px) rotate(0deg);
  }
}

@keyframes fade {
  0% {
    opacity: 0;
  }
  25%,
  60% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes hueRotate {
  0% {
    filter: hue-rotate(0);
  }
  100% {
    filter: hue-rotate(360deg);
  }
}
