Be Stenciled Or Be Penciled

This picture started from an experiment with circles, using paper, pen or pencil and my latest toy back then, a stencil of circles, in black and white. Each ~horizontal row is made from very-close-to-the-same size circle with the row it below using a slightly smaller circle. I tried to make the circles just barely touch to the same degree. This 8x8 curved trapezoidal shape was a pleasant surprise. I made several other designs using the this technique, but I have only scanned this one into the computer so far, and then took it from simple monochrome circles to a textured 3-D like surface.

I checked the definition for trapezoid, and it requires a pair of parallel sides. A similar new vocab word (for me, not from me) today is the word "trapezium", which is a four sided irregular quadrilateral with no sides being parallel, all sides being different lengths. But my newly minted adjective of trapeziumial appears to be new with no matches in a Google search. It is easier to pronounce if you put the accent on the "um".

So this is my warped geometrical answer to the expression, "Be there or be square", - "Be stenciled or be penciled".