Default [Q] Joke about Android version

Hi guys. I want make joke for my friend. He have Nexus 4 and 4.4.2 and he is proud of this. -.-
I know about build.prop but i can change wallpaper and text "Android 4.3" which is located on the wallpaper kitkat? If it possible to make android eraser egg its will be great!

Sorry for my bad English and i think stupid post but who knows