/* From Uiverse.io by elijahgummer */ 
.hole {
  display: flex;
  align-items: center;
  justify-content: center;
}

i {
  display: block;
  position: absolute;
  width: 50px;
  height: 50px;

  border-radius: 140px;
  opacity: 0;
  animation-name: scale;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

i:nth-child(1) {
  animation-delay: 0.3s;
}

i:nth-child(2) {
  animation-delay: 0.6s;
}

i:nth-child(3) {
  animation-delay: 0.9s;
}

i:nth-child(4) {
  animation-delay: 1.2s;
}

i:nth-child(5) {
  animation-delay: 1.5s;
}

i:nth-child(6) {
  animation-delay: 1.8s;
}

i:nth-child(7) {
  animation-delay: 2.1s;
}

i:nth-child(8) {
  animation-delay: 2.4s;
}

i:nth-child(9) {
  animation-delay: 2.7s;
}

i:nth-child(10) {
  animation-delay: 3s;
}

@keyframes scale {
  0% {
    transform: scale(2);
    opacity: 0;
    box-shadow: 0px 0px 50px rgba(255, 255, 255, 0.5);
  }
  50% {
    transform: scale(1) translate(0px, -5px);
    opacity: 1;
    box-shadow: 0px 8px 20px rgba(255, 255, 255, 0.5);
  }
  100% {
    transform: scale(0.1) translate(0px, 5px);
    opacity: 0;
    box-shadow: 0px 10px 20px rgba(255, 255, 255, 0);
  }
}