If you put an incorrect code, then it will make a incorrect sound at you. If you input the correct code, it will honk at you and give you 1000 code points. If you input the correct code a second time, it will give you an error message saying you have already tried the code. The correct code to get 1000 points is 1017.
This is 100% my work. I got the idea while I was going through T.J. Maxx.
