<!DOCTYPE html>
<html>
<body>
<div style="margin-top: 20px; width: 100px; height: 100px;"></div>
<div style="margin-bottom: 20px; width: 60px; height: 40px;"></div>
<div style="margin-top: 20px; width: 100px; height: 100px;"></div>
</body>
</html>