@keyframes zoom-in-zoom-out {
  0% {
    transform: scale(1, 1);
  }

  50% {
    transform: scale(1.5, 1.5);
  }

  100% {
    transform: scale(1.5, 1.5);
  }
}

.zoom-in-out-box {

  background: #f50057;
  animation: zoom-in-zoom-out 6s ease infinite;
}