“Bouncing Balls, Beautiful Patterns” von Shinyframes. Toller Sound auch.
Satisfying simulations of bouncing balls obeying physical laws; for a fleeting moment during the simulation, the balls pass through a beautiful regular arrangement.
Each sequence is obtained by joining two simulations, both starting from the time in which the balls are arranged regularly. One simulates forward in time, one backwards.
(Direktlink, via Kottke)