This generative art piece reproduces a Sol LeWitt wall drawing using pure JavaScript and the SVG API. It displays a grid of alternating horizontal and vertical stripes that intersect within central circular masks, creating a layered geometric pattern. The code constructs an SVG canvas with two circle masks—one revealing horizontal bars, the other vertical bars—overlaid to produce the final composition. No external libraries are used; all elements are created dynamically via `document.createElementNS` and styled with inline attributes.