This example generates a colorful, generative art piece inspired by Sol LeWitt, built entirely with vanilla JavaScript and the SVG API. It renders a full-screen grid of randomly colored vertical rectangles, then overlays a large white circle in the center. A second grid of horizontal rectangles is clipped to that same circular shape using an SVG `<mask>`, creating a layered, intersecting pattern. All shapes are created dynamically via `document.createElementNS`, with colors assigned through randomized RGB values.