Move Alternately
circles: 1 circles: 1
strokes: 1 strokes: 1
twin: 1 twin: 1
radius: 120 radius: 120
grow: 50 grow: 50
variation: -1.0 variation: -1.0
size: 10 size: 10
length: 0.10 length: 0.10
count: 20 count: 20
I saw a very similar demo by @junkiyoshi at X (f.k.a. Twitter) and had to come up with a clone without looking at the original source code.
I think I came quite close, but I had to play with all the parameters and see what else is within this peace of maths. Other favorite presets of mine are these: