This reproduction of a Sol LeWitt wall drawing uses SVG to display two sets of perpendicular, evenly spaced horizontal and vertical lines. A circular mask restricts the visible pattern to a central disc, creating a clean, geometric composition. The code uses the Document API (`document.createElementNS`) to build the SVG structure and applies a `<mask>` with a `<circle>` to clip the lines. It generates one hundred horizontal and vertical `<rect>` elements, each ten pixels thick, with the horizontal band masked. The visual effect directly mimics LeWitt’s instructional art, translating his line-based system into an interactive browser window.