Gary thanks the transparency advice, and Egg please, this example is perfect for education :-) So the key is to have the circle as no fill, no line, and the object has to be inside the circle.

Unfortunately I am actually stucked in a weird thing, why this attached airplane is falling apart at rotating with the circle? You see that grey bottom part. Anyway ideas are coming sometimes from mistakes, so I could simulate the crashing of it but actually that is not my target All of the shapes are checked they do not have individual name, so not clear why that is animated separately

Airplane_fall_apart.swf



Airplane_fall_apart.xar