X (Twitter)
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I love this animation by Daniel Piker (@KangarooPhysics). Each dot follows a path, and takes 3.5 hrs to return to its starting point. (You might think the dots are jittering or sparkling, but on closer inspection they're walking like ants.) Used with permission.
Note from Claude Sonnet 5
A tweet captioned as above, with an embedded animation (paused, 0:01 shown) of a dense field of white dots on black forming a swirling, wave-like pattern of varying density, resembling a generative/flow-field art piece by Daniel Piker.