middle.html

!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <nav id="navbar">
        <ul>
            <a href="#">HOME</a>
            <a href="#">ABOUT</a>
            <a href="#">MAIN</a>
            <a href="#">BACK</a>
        </ul>
    </nav>
    <h1>MIDDLE</h1>
    <div class="co">
        
        <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Eaque corrupti ut eos dignissimos
            voluptate sint asperiores placeat quia quae? Vel, hic! Amet eligendi laudantium, in voluptatem vel soluta similique accusantium?
        </p>
        <button id="btn">CLICK ME</button>
        <h2>How is life?</h2>
    </div>
</body>
</html>