A five-fold aperiodic Penrose rhombus tiling generated analytically from a de Bruijn pentagrid — five rotated 1-D lattices at 72° whose crossings tessellate the plane into thick (72°) and thin (36°) rhombi that never repeat. Each fragment locates the two nearest lattice lines and colours its cell by the family gap of that crossing, so a clean two-tone kite/dart mosaic emerges with crisp seams. A radius sweeps outward from the centre so the tiling appears to build itself out from the core, while the whole field turns slowly. The pointer slides the pentagrid offsets so the weave rearranges (it drifts on its own when the cursor leaves), scrolling rescales the tiles, and a press cycles the palette. Purely geometric — no letters (distinct from #435).