The idea is really simple: The user enters how much money they need to save, how much money they have, and a pie chart appears below along with the text of how much they still have to save. I poked around with xcode, and now I have a GUI.. but I have no idea how to write the actual code to link the GUI to the back-end, or where the back-end code even gets written! As you can tell, I'm a n00b at xcode. Here's what I'm asking for. Where do I go to write the actual code? Is there an easy way to make a pie-chart? How do I link the GUI to the actual code of the program? What else do you think I should know? I've attached screen shots of what I'm trying to do, and what I have. If this is too needy of a request, I apologize in advance. Also, if you have a good link to a tutorial that would help, I'll take that too, I just can't seem to find a good tutorial that'll transform my java abilities into xcode.