<html> <head> <style> input[type=password] { width: 50%; position: fixed; top: 45%; left: 25%; padding: 12px 20px; box-sizing: border-box; border: 1px solid; color: hsl(0, 0%, 80%); visibility: hidden; } input[type=submit] { visibility: hidden; } </style> <script src="konami.js"></script> </head> <body> <script> var konami = new Konami(function() { document.getElementById("passwd").style.visibility = "visible"; }); </script> <form action="verify.php" method="post"> <input id="passwd" type="password" name="password"> <input type="submit" name="submit" value="Submit"> </form> </body> </html>