Establishes theoretical principles of diffractive analysis and physics of diffraction of light, along with formal elements including flicker, orbits, faster tempos, repetition and difference. Barrier-grid animation, Deleuze on rhythms, Lefebvre (Arrhythmia, Polyrhythmia, Eurhythmia, Isorhythmia), Pinwheel, Dream Machine, ripple tank, splodascope, Sitney, Tony Conrad,  Paul Sharits,  Frank Malina, Larry Cuba, John Whitney/James Whitney (Cam Machine), Tundra. wilfred on slow rhythyms [Ian McIntyre Candela](https://ianmcintyre.co.uk/studio/candela/) Optical Russian moire and interference patterns https://cdm.link/enter-trippy-fanciful-world-soviet-light-art-studio-prometheus/ https://youtu.be/TPy6oheGrFE?si=Ry3Tevv4rgwXQHcv [john whitney](https://youtu.be/jIv-EcX9tUs?si=YA3kGFHn6YdQwjVP)"# Experiments in motion graphics 1968 - Generative graphics