<!DOCTYPE html>
<html>
<head>
</head>
<body>
    <div style="margin: 123px; position: relative">
        <div style="width:200px; height:150px; background:lime;"></div>
        <div style="position: absolute; left: 100px; top: 150px; width:100px; height:100px; background:lime;"></div>
        <div style="position: absolute; left: 100px; top: 200px; width:100px; height:100px; background:blue;"></div>
    </div>
</body>
</html>