.loader {
  padding-top: 25%;
}

.loader img {
  animation-duration: 1s;
  animation-name: rotate;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  display: block;
  margin: 0 auto;
  height: 100px;
  width: 100px;
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}