i wish to make a pattern, where each element is a circle, all concentric, and of varying sizes. (Like tornado) .

So Circle#1 has a center at x=0 y=0 z=0 and a radius of 1 mm.

Circle#2 has a center at x=0 y=0 z=1 and a radius of 2mm.

Circle#3 has a center at x=0 y=0 z=2 and a radius of 3 mm.

Circle#4 has a center at x=0 y=0 z=3 and a radius of 4 mm

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up to Circle#X has a center at x=0 y=0 z=n and a radius of Y mm.