index.html

<!DOCTYPE html>
    <html lang="es">  
    <head>

        <title>Excuse generator</title>    
        <meta charset="UTF-8">
        <meta name="title" content="Título de la WEB">
        <meta name="description" content="Descripción de la WEB">    
        <link href="styles/styles.css" rel="stylesheet" type="text/css"/>

    </head>

    <header>
        <div id="header_container">
            <h1>What will be your excuse today?</h1>
        </div>
    </header>

    <body>
        
        <div id="container">

            <div id="text">
                <h3 id="Excuse"></h3>
            </div>

            <div id="bottom">
                <button onclick="Excuse_generator()">Excuse</button>
            </div>
        </div>

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