Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script>
        document.addEventListener('DOMContentLoaded', () => {

        });
    </script>
</head>
<body>
    <h1></h1>
    <input type="button" id="up" value="Нагоре">
    <input type="button" id="correct" value="Познато!">
    <input type="button" id="down" value="Надолу">
</body>
</html>