index.html

<!DOCTYPE html>
<html lang="en-US">
<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">
    <link rel="shortcut icon" href="images/ws.png" type="image/x-icon">
    <link rel="stylesheet" href="style.css">
    <title>Stopwatch</title>
</head>
<body>
    <header>
        <h1>Stopwatch</h1>
    </header>
    <main>
        <section>
            <h2 id="timer">00:00:00<span id="millisecond">:00</span></h2>
            <article>
                <button id="start">Start</button>
                <button id="pause">Pause</button>
                <button id="stop">Stop</button>
            </article>
        </section>
    </main>
    <footer>
        <p>Matheus Kiyoshi Ferreira</p>
    </footer>

    <script src="script.js"></script>
</body>
</html>