Sorry for the double post. Attached a more basic example of what I'm trying to get. Run the frame, press 1 once, then hold 2 and 3 together. You'll see the rotation. Quit holding the keys and then use the arrow keys to move the ball close to one of the red balls. Then press 1 once again, and hold 2 and 3 together. You'll see how the focus point of the rotation changes. Basically this, on a larger scale.