This example reproduces Sol LeWitt’s geometric wall drawing using overlapping horizontal and vertical stripes that intersect within two circular masks. It renders 100 thin rectangles per direction across the full viewport, with the first mask revealing the horizontal set as a white circle on black, and the second mask revealing the vertical set as a black circle on white. Built with D3 v6, the code uses `select`, `range`, and `join` to generate SVG `<rect>` elements, while mask definitions control visibility. The result shows two concentric circular zones of striped patterns against a plain background.