The 15 variations on a single theme by Max Bill are the transformation of an equilateral triangle into an octagon, which, maintaining the same side length, rotates and opens outward in a spiral. Max Bill was a very influential founder of the concrete art movement and formulated the principles of concrete art by expanding the theories of Theo van Doesburg.

Cornelia Vargas performs a series of exercises that correspond to variations on Bill's theme. In this variation from December 1995, she uses a right triangle for the construction following the same transformation principle.

480 x 360 mm, gouache on paper