picoCTF - picoGym | Bookmarklet Challenge

Welcome to my flag distribution website!

If you're reading this, your browser has succesfully received the flag.

Here's a bookmarklet for you to try:

        javascript:(function() {
            var encryptedFlag = "àÒÆÞ¦È¬ëÙ£ÖÓÚåÛÑ¢ÕÓÒËÉ§©í";
            var key = "picoctf";
            var decryptedFlag = "";
            for (var i = 0; i < encryptedFlag.length; i++) {
                decryptedFlag += String.fromCharCode((encryptedFlag.charCodeAt(i) - key.charCodeAt(i % key.length) + 256) % 256);
            }
            alert(decryptedFlag);
        })();