This is a physical demonstration of 15 uncoupled pendulums, each with a slightly different length. Released at the same time, their individual frequencies cause the entire system to create traveling waves, standing waves, beats, and even moments of apparent "chaos". But nothing here is random. The longest pendulum completes 51 oscillations in 60 seconds. Each shorter one swings one more time than the last, so the shortest (15th) completes 65 oscillations per minute. Over time, their motions drif