blocks.html

<!doctype html>
<html lang="en-US">
<head>
    <title>Front End</title>
    <link href="css/style.css" type="text/css" rel="stylesheet">
</head>
<body>

<div id="header">
    <h1>Blocks</h1>
</div>
<div id="content">

    <div class="red">
        This is my red class
    </div>

    <div class="blue">
        This is my blue <span>class</span>
    </div>

</div>
<div id="footer">
    <ul>
        <li>Soccer</li>
        <li>Football</li>
        <li>Baseball</li>
    </ul>
</div>

</body>
</html>