A stable feedback loop within the boxes! reaction-diffusion system. Look at the FBOs to see how force and length oscillate over time.
See also the boxes! sketch. (vimeo.com/50841645)
Find the source code here: poniesandlight.co.uk/code/ofxVboMeshInstanced
This builds on the openFrameworks flatshading tutorial found here: poniesandlight.co.uk/notes/flat_shading_on_osx/