<!DOCTYPE html>
<html>
<body>
<div style="border: 10px solid green; width: 200px; height: 200px;">
    <div style="border: 1px solid green; width: 200px; height: 200px;"></div>
</div>
<div style="border-top: 5px solid green; width: 200px; height: 200px;">
    <div style="border-bottom: 1px solid green; width: 200px; height: 200px;"></div>
</div>
<div style="border: 10px solid green; width: 200px; height: 200px;">
    <div style="padding: 10px; border: 1px solid green; width: 200px; height: 200px;"></div>
</div>
<div style="border: 10px solid green; width: 200px; height: 200px;">
    <div style="margin: 10px; border: 1px solid green; width: 200px; height: 200px;">
        <div style="margin: 10px; width: 200px; height: 200px;">
            <div style="margin: 10px; border: 1px solid green; width: 200px; height: 200px;"></div>
        </div>
    </div>
</div>
</body>
</html>