A drifting shoal of small tesseracts (4D hypercubes projected to 3D). Each body tumbles through its own 4D rotation so cells fold inside-out endlessly and the swarm reads as churn — until a periodic sync envelope pulls every rotation toward one global orientation and snaps the bodies onto a lattice, crystallising a single giant hyperstructure for a beat before it dissolves back into private chaos. Hold the pointer to force the alignment.