This example reproduces a Sol LeWitt wall drawing using only SVG and JavaScript, creating a grid of alternating horizontal and vertical bands. Two circular masks reveal the layered strokes: the first mask exposes vertical strips within a centered circle, while the second inverts that region to show horizontal strips outside it. The code generates 100 rectangles per direction, each 10 pixels thick, using the `document.createElementNS` API and SVG `mask` elements to compose the visual interplay. The result is a clean, geometric abstraction that mimics the artist’s instructional art style.