This example reproduces Sol LeWitt’s geometric wall drawing using SVG masks and repeated rectangles to create intersecting striped patterns. A circular mask reveals portions of horizontal and vertical bars, while the second mask inverts the visibility to produce a checkerboard-like overlap. The page uses raw JavaScript with `document.createElementNS` to build the SVG dynamically, sizing elements to the full browser window. No external libraries are required, and the work is a direct homage to the artist’s instructional art.