Temporary picts

[Shari]

If I wanted to show a temporary graphic in Hypercard, I'd use 
addColor colorPict.

I could use this to create 50 duplicate images of a graphic, moving 
across the screen randomly, leaving a trail of graphics behind. 
Without needing 50 objects to link the graphics to.

Is there a way to do this in Metacard?  Show a graphic temporarily, 
not linked to an object (not requiring that I have 50 or 100 image 
objects), then be able to wipe the images away with a visual effect?

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