.loading {
  width: 50px;
  height: 50px;
  border-radius: 100%;
  background-color: #E4A109;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;

  animation: ball-scale infinite linear 0.75s;
}

@keyframes ball-scale {
  0% {
    transform: scale(0.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}