Hey Kl'Dck! I understand members, setters & getters now. More importantly I looked at the documentation & the two examples. It seems like in both the ball & fire demo the MODULEs were compiled... It seems the remaining MAIN file refers to those objects still, but it's moved into the DIST file, correct? I'm still trying to wrap my head around this. I would like to make a couple tools using OOP.