<div class="item">
  
</div>

.item {
margin-left: 80%;
  width: 200px;
  height: 300px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 0 10px #ccc;
  background-color: rgba(255,184,34,.07)!important;
  &:after {
  content: ' ';
    width: 1000px;
    height: 1025px;
    position: absolute;
    bottom: 65%;
    left: -250px;
    border-radius: 35%;
    background: #fff;
    z-index: 0;
    animation: wave 10s infinite linear;
    }
}    

@keyframes wave{from{-webkit-transform:rotate(0);transform:rotate(0)}from{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}