Im new to AS but i know a few things, what i have atm is a program for images, it has external class files and i am able to get a tray to come up from the bottom, (probably not correctly i will say) but i cant do the opposite, iv attached the instructions i was given but they aren't clear enough for me, also hear is my current files for my project, please help i cant get my head around it all

https://docs.google.com/open?id=0B6D...mMyN2tjWmRLN3M