One can generate nice patterns using only XOR, like the 2D pattern on the left: (doseq [x (range w)] (doseq [y (range h)] (when (not (zero? (mod (bit-xor x y) 7))) (draw-mark x y)))) … but it's also possible to add another dimension to carve a 3D shape, like the render on the right.
3d munching squares
Oh my god. I tried out LOGNOR (bitwise not) and yet again some variant of the Sierpinski triangle pops out (I'm using my own eccentric Common Lisp library here, rather than Clojure). Actually, several operations do. That triangle might be the key to the universe.
animate it for the munching squares