Every lattice point of ℤ⁴ within ℓ¹-distance R of the origin, joined by the eight twists. Edge colour is the ℤ₂ connection; a closed path's Pauli phase is the product of its edge signs.
Spatial axes X, Y, Z are drawn as three orthogonal directions; the gauge axis is the fourth, drawn as a skew offset. Drag to rotate, wheel to zoom, hover a node for its ways-to-close counts h(x,t). Spec: Closure_Walk.md §3; built and checked by closure_graph.py.