.cube {
  position: absolute;
  width: 10px;
  height: 10px;
  border: solid 1px #D7D4E4;
  transform-origin: top left;
  transform: scale(0) rotate(0deg) translate(-50%, -50%);
  animation: cube 5s ease-in forwards infinite;
  overflow: hidden;
}
.cube:nth-child(2n) {
  border-color: #FFF ;
}
.cube:nth-child(2) {
  animation-delay: 2s;
  left: 25vw;
  top: 40vh;
}
.cube:nth-child(3) {
  animation-delay: 4s;
  left: 75vw;
  top: 50vh;
}
.cube:nth-child(4) {
  animation-delay: 6s;
  left: 90vw;
  top: 10vh;
}
.cube:nth-child(5) {
  animation-delay: 8s;
  left: 10vw;
  top: 85vh;
}
.cube:nth-child(6) {
  animation-delay: 10s;
  left: 50vw;
  top: 10vh;
}

@keyframes cube {
  from {
    transform: scale(0) rotate(0deg) translate(-50%, -50%);
    opacity: 1;
  }
  to {
    transform: scale(20) rotate(960deg) translate(-50%, -50%);
    opacity: 0;
  }
}