pDES {
  animation-duration: 3s;
  animation-delay: 5s;
  animation-name: glissement;
  animation-iteration-count: infinite;
}
@keyframes glissement {
  from {
    margin-left: 100%;
    width: 300%;
  }

  to {
    margin-left: 0%;
    width: 100%;
  }
}