.circles {
  margin-top: -4690px;
  height: 90vmin;
  position: relative;
  width: 90vmin;
  transform: scale(0.1);

  
}
.circles > div {
  animation: growAndFade 3s infinite ease-out;
  background-color: #f4f3f191;
  border-radius: 50%;
  height: 100%;
  opacity: 0;
  position: absolute;
  width: 100%;
}
.circles .circle1 {
  animation-delay: 1s;
}
.circles .circle2 {
  animation-delay: 2s;
}
.circles .circle3 {
  animation-delay: 3s;
}

@keyframes growAndFade {
  0% {
    opacity: 0.25;
    transform: scale(0);
  }
  100% {
    opacity: 0;
    transform: scale(1);
  }
}