Keypads

I have Always wanted keypads. I hate having to create a huge unnecessary contraption. But with this little gadget, I could just place a keypad down, and it would be tiny! If you right-click on it, it will show a screen where you can type in a new code. You can place this thing on walls and it would emit a redstone signal if you typed in the right code, or combine it with an iron door in a crafting table to create a keypad door. - Thank you!