How to reuse shapes for animation?

edited March 2014 in How To...

Hi, I am new to processing. I am trying to move a red circle along a line. I have a background (not just a color). The problem for animation is inside draw function I always have to call ellipse(x, y, w, h) function to create a new ellipse and to hide the previous one I need to call background(255) before the ellipse(). But in my case the background is a static content generated with code in setup() and I do not want to redraw it. So without creating hundreds of ellipses inside draw() can I somehow create an ellipse object in setup() and just change it's co-ordinates inside draw()? Can anybody help please?


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