Untitled

<!DOCTYPE html>
<html>
    <head>
        <title>Page Title</title>
    </head>
    <body>
        <div class="top" id="red">
             <h3><strong>Red</strong></h3>
        </div>
        <div class="top" id="blue">
         <h3>Blue</h3>
        </div>

        <div class="bottom" id="yellow"><h3><strong>Yellow</strong></h3></div>

        <div class="bottom" id="green"><h3><strong>Green</strong></h3></div>
    </body>
</html>