.loader {
  width: 215px;
  height: 215px;
  display: block;
  margin: auto;
  position: relative;
  background: #FFF;
  box-sizing: border-box;
  border-radius: 10px;
}

.loader::after {
  content: '';
  width: calc(100% - 30px);
  height: calc(100% - 30px);
  top: 15px;
  left: 15px;
  position: absolute;
  background-image: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5) 50%, transparent 100%),
   radial-gradient(circle 50px , #DDD 100%, transparent 0),
   linear-gradient(#DDD 16px, transparent 0),
   linear-gradient(#DDD 24px, transparent 0);
  background-repeat: no-repeat;
  background-size: 75px 175px, 100% 100px, 80% 16px, 80% 16px;
  background-position: -185px 0, center 10px, center 125px, center 155px;
  box-sizing: border-box;
  animation: animloader 1s linear infinite;
}

@keyframes animloader {
  to {
    background-position: 185px 0, center 10px, center 125px, center 155px;
  }
}