success.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Success!</title>
    <script src="js/javascript.js"></script>
    <script src="js/success.js"></script>
  </head>
  <body>
    <header>
      <h1>Submission Successful!</h1>
    </header>
    <article id="back_form">
      <form action="./contact.html">
        <input type="submit" value="Back" />
      </form>
    </article>
  </body>
</html>