<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
    <div style="overflow:hidden; border-radius:25px; border:3px solid #f00; padding:1px; height:180px;">
        <div style="height:100px; width:100px; background-color:lime"></div>
        <div style="height:100px; width: 50px; background-color:red; position:relative; top: -20px;"></div>
    </div>
    <div
</body>
</html>