COB-exact: timeline 1:1 from ARMACK.COB (rev31.gp3, the 3.1 balance). the advanced builder unfolds a GUN CASE (68° drop) and a nano joint before the arms deploy.
Animation

PNG frames

Frame 0 / 1340.00 s
COB timeline (ARMACK.COB)
- 0.04–1.28 s — Walks one full gait cycle (16 stop-motion poses)
- 1.28–1.90 s — Stopping
- 2.05–2.10 s — RequestState: torso turns to the build site (160 deg/s), legs snap to rest
- 2.10–2.85 s — guncase drops −68° (90 deg/s); the nano joint settles −4° (5 deg/s)
- 2.85–5.40 s — Build hold — the two nano arms extend in the compiled order (22 stages parsed from the bytecode)
- 5.40–7.60 s — Folds back (the close stage of the same script)
- 7.95–9.23 s — Walks the gait cycle again