<div class="skin">
  <div class="flesh"></div>
</div>
.skin {
  margin-top: 150px;
  margin-right: auto;
  margin-left: auto;
  width: 400px;
  height: 200px;
  -webkit-border-bottom-right-radius: 400px;   
 -webkit-border-bottom-left-radius: 400px;
 -moz-border-radius-bottomright: 400px;   
 -moz-border-radius-bottomleft: 400px;
  border-bottom-left-radius: 400px;
  border-bottom-right-radius: 400px;
  box-shadow: 2px 2px 5px black;
  background-color: green;
  transition: all 1s;
  cursor: pointer;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.