index.html

<!DOCTYPE html>
<html>
    <head>
        <title>Type</title>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KyZXEAg3QhqLMpG8r+8fhAXLRk2vvoC2f3B09zVXn8CA5QIVfZOJ3BCsw2P0p/We" crossorigin="anonymous">
    </head>
    <link rel="stylesheet" href="styles.css">
    <body class="bg-dark">
        <div class="content">
            <h1 class="timer">Start In 120 Second</h1>
            <p class="text"></p>
            <p class="ghost"></p>
            <div class="type">
                <div class="mb-3">
                    <input type="text" class="form-control input bg-dark btn-outline-primary" id="input" oninput="onInput()" placeholder="Start Typing..." disabled>
                </div>
                <button class="btn btn-dark btn-outline-primary start" onclick="init()">Start Timer</button>
            </div>
        </div>
    </body>
    <script defer src="script.js"></script>
</html>