Objects gouge out forms in space, and as one form recedes, another comes forward. The constant process of “push answering pull and pull answering push” is what Painter Hofmann tries to capture.

Grand Rapids Student-made machines push, pull and crank at Rube Goldberg art exhibit Updated: May. 20, 2017, 1:30 p.m. | Published: May. 20, 2017, 12:30 p.m.