If 20 pendulums move with speed 1, 2, …, 19, 20, then they move in an ordered, simple way. They make regular patterns of bunched pendulums, called "pendulum waves".
On the other hand, if the pendulums have random speeds, then they move in a random, disordered way. Although they do line up occasionally!
If we make other choices for the speeds, we can get a mix of order and randomness. Stop and try the options below. What patterns do you see? What differences do you see?
The "choose" button lets you put in your own speeds for the pendulums (between 1 and 99).
Can you get a balanced mix between pendulum waves and disorder? Can you get systematic order about half of the time, and random motion the other half of the time? Make a note of any speeds that seem to work.