how do I change the background of a room to the next because I want it to be were the play click on the wall and then the background will fade to the img? it doesn't have to fade but i would look a lot better then it looking like an 80's effect.
You change a room's background using SetBackgroundFrame. The best way to fade it is use a black GUI. I personally use a black gui for fade effects.
Do you mean fade (as in to black) or dissolve (as in one image slowly being replaced by another)? I got the impression you meant dissolve, in which case it's possible to set the room transition to dissolve.
If you want to gradually change backgrounds within a room, I remember a few threads discussing techniques but this (http://www.adventuregamestudio.co.uk/yabb/index.php?topic=37717.0) is the only one I could find. Perhaps it will help.