<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css" media="screen">
div{
width: 100px;
height: 100px;
margin: 0 auto;
background: #ccc;
/* border-radius: 50%; */
border-radius: 10px 20px 30px 40px/20px 30px 40px 50px;
}
</style>
</head>
<body>
<div>
</div>
</body>
</html>