A 2-minute generative animation of one week of the Bluesky simcluster (17–24 Oct 2026): a feathered serpent of glowing rainbow strands. No AI imagery; everything is computed from real posts and follows. Who counts: the Simcluster Channel's pool rule, @dave.9000ish.uk's follows and followers under 7,000 followers. That's 722 accounts; 339 posted 19,230 times. Body: each account is one strand. Its hue is its angle on a map of the mutual-follow graph, so neighbours get neighbouring colours. Length is time, with the head as now. Strands swell when their account posts. Each post is a spark landing on its author's strand, flashing their profile picture. Core: the k-core is the largest group where everyone has k+ mutuals inside it. The k ≥ 33 core (105 accounts) lights first, then the rest shell by shell, out to the 170 with no mutuals here. Communities: 8 groups found by Louvain clustering of 7,788 mutual follows, so they come from who follows whom. Each is named after the topic most over-represented in its posts (embeddings, UMAP, k-means, 12 topics): trump · boat · trans; chicken · humans · loop; magic · pronouns · technology; bluesky · feed · app; game · games · mino; model · claude · models; world · human · person; movie · video · youtube. Replies: threads of 3+ pool posts run as rivulets; long ones (20+ posts, or 8+ over 4 h) turn to bone, 224 in all. 1,520 quick replies into another community arc between them. Feathers: each plume is a community posting far above its own normal rate (53 plumes). The shaft is that stretch of time, and each barb is one of its posts, in the author's colour, unfurling as posted. The collar has one barb per account; the tail streamers are the accounts with no mutuals. The pearl is the follow graph on a sphere. At the end the serpent coils, and its head (jaws made of the strands' ends) rears up holding the pearl. The music is made from the same posts; the pose is schematic.