.spinner .spinner-ball {
  animation: pulsing 2s ease infinite;
}

.spinner .spinner-ball:nth-child(2) {
  animation-delay: 0.2s;
}
.spinner .spinner-ball:nth-child(3) {
  animation-delay: 0.4s;
}
@keyframes pulsing {
  0% {transform: scale(1);}
  35% {transform: scale(1);}
  60% {transform: scale(1.3);}
  75% {transform: scale(1.3);}
  100% {transform: scale(1);}
}