A procedural paper-folding animation: a cross-shaped (box-net) paper mesh folds panel-by-panel into an open box, holds, then unfolds and loops. Each of the 4 arms rigidly rotates about its crease hinge using per-frame axis-angle (Rodrigues) rotation applied to the rest-pose vertices, so folds stay perfectly crisp with no drift. A cubic-eased keyframe timeline sequences the 8 fold/unfold steps.