A D3.js reproduction of a Sol LeWitt drawing renders alternating horizontal and vertical black stripes on a light gray canvas. The piece uses generated SVG rectangles, created with `range` and `.join('rect')`, and defines two SVG masks—`circle-mask` and `circle-mask2`—to clip the stripes into two circular forms. The first mask reveals horizontal stripes inside a white circle, while the second reveals vertical stripes in the inverse pattern, creating an intersecting optical composition across the full browser window.