@-webkit-keyframes move {
  100% {
    -webkit-transform: translate3d(0, 0, 1px) rotate(360deg);
  }
}

@-moz-keyframes move {
  100% {
    -moz-transform: translate3d(0, 0, 1px) rotate(360deg);
  }
}

@keyframes move {
  100% {
    transform: translate3d(0, 0, 1px) rotate(360deg);
  }
}

.background {
  position: fixed;
  width: 100vw;
  height: 100vh;
  top: 0;
  left: 0;
  background: #3E1E68;
  overflow: hidden;
}

.background span {
  width: 9vmin;
  height: 9vmin;
  border-radius: 9vmin;
  backface-visibility: hidden;
  position: absolute;
  -webkit-animation: move;
  -moz-animation: move;
  animation: move;
  animation-duration: 48s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.background span:nth-child(1) {
  color: #FFACAC;
  top: 52%;
  left: 77%;
  animation-duration: 12s;
  animation-delay: -2s;
  transform-origin: 22vw 25vh;
  box-shadow: 18vmin 0 2vmin currentColor;
}

/* ...perbaiki elemen lainnya dengan cara yang sama... */

.background span:nth-child(20) {
  color: #CDDEFF;
  top: 49%;
  left: 45%;
  animation-duration: 30s;
  animation-delay: -7s;
  transform-origin: 22vw 25vh;
  box-shadow: 18vmin 0 1.5vmin currentColor;
}