Will the stages change size and have a different back round when you move the stage. For example the the screen will have 3 different stages on each corner. But when you look on the inside there will be another stage to have a multi stage on your screen. Also, when you are trying to erase something on your screen. The screen by the object or sprite you are trying to erase won't erase the screen, too. The eraser will on the erase the the object or the sprite.
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I don't exactly know what you mean... could you describe it a little more clearly?
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