Hello all, first post in the forums after using Processing for about...45 minutes!

I've started a very basic program in Processing to get to grips with how it handles & executes - I went with the Java mode as I have a decent Java/C#/OO background and my ultimate goal will require something more complex than the basic or continuous modes.

I have two PDE files in my sketchbook, a "main" class called MovingBlocks and another class called Square. Basically MovingBlocks spawns multiple Square objects and displays them. However, when I try to run the program, the compiler complains that Square has no width/height properties & methods such as fill() and rect() do not exist. I've looked through Daniel Shiffman's examples (thanks, by the way!) and cannot see any structural differences from my code.

I'm guessing there's a problem in the way that I "execute" my program which is causing Square not to be incorporated into MovingBlocks, thus getting the methods from processing (being treated as a normal Java file instead of a Processing file).

Apologies if this is a bit vague, quite hard to communicate non syntax/programming problems! Any input would be greatly appreciated to get me over this little hurdle, cheers.