Edit in JSFiddle

JavaScript
HTML
CSS
Result

<body>
  <div>
    This is my paragraph. Like my border? This is my paragraph. Like my border?This is my paragraph. Like my border?This is my paragraph. Like my border?This is my paragraph. Like my border?
  </div>
</body>

div {
  border:solid 5px #0ff;
  width:200px;
  margin:25px auto;
  border-radius: 255px 15px 225px 15px/15px 225px 15px 255px;
  padding:10px;
}