Wait long enough for pendulums to align again The pattern repeats with variations between Adjust sliders
Credit to @crkcity for the source project. I replaced the background music with pendulum-triggered sound. Different pendulum length -> different swing speeds. Each has slightly longer length than previous with speed inversely proportional to square-root of length. The pendulums' traveling wave patterns gradually go out of phase then back in phase. Toy model versions are widely available, but they eventually stop swinging.
