This example recreates Sol LeWitt’s geometric wall drawings using D3.js and SVG masks. A grid of horizontal and vertical rectangles is clipped by two complementary circular masks, creating intersecting bands that reveal or hide lines in alternating regions. The visualization uses `d3.select`, `d3.range`, and `join` to generate the rectangles, with masks defined via SVG `mask` elements. The layout fills the browser window, and the code runs in a React environment with SVG rendering.