.skeleton {
  background-image: linear-gradient(270deg, #fafafa, #eaeaea, #eaeaea, #fafafa);
  background-size: 400% 100%;
  animation: skeleton 8s ease-in-out infinite;
}

@keyframes skeleton {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}