css_reflection

.reflection {
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  background-color: white;
}

.reflection::after {
  content: "";
  display: block;
  width: 30px;
  height: 100%;
  position: absolute;
  top: -180px;
  left: 0;
  background-color: #FFF;
  opacity: 0;
  transform: rotate(45deg);
  animation: reflect 4s ease-in-out infinite;
  animation-duration: 5s;
  -webkit-transform: rotate(45deg);
  -webkit-animation: reflect 4s ease-in-out infinite;
}

@keyframes reflect {
  0% { transform: scale(0) rotate(45deg); opacity: 0; }
  80% { transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { transform: scale(4) rotate(45deg); opacity: 1; }
  100% { transform: scale(50) rotate(45deg); opacity: 0; }
}
@-webkit-keyframes reflect {
  0% { transform: scale(0) rotate(45deg); opacity: 0; }
  80% { transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { transform: scale(4) rotate(45deg); opacity: 1; }
  100% { transform: scale(50) rotate(45deg); opacity: 0; }
}