.loader {
  width: 48px;
  height: 48px;
  display: inline-block;
  position: relative;
  background: #FFF;
  box-sizing: border-box;
  animation: zeroRotation 1s ease infinite alternate-reverse;
}

@keyframes zeroRotation {
  0% {
    transform: scale(1) rotate(0deg);
  }

  100% {
    transform: scale(0.3) rotate(360deg);
  }
}