This example reproduces a Sol LeWitt-inspired drawing by generating a grid of horizontal and vertical stripes that intersect across the full browser window. Two SVG masks create a central circular aperture: the first mask reveals the horizontal stripes inside the circle, while the second reveals vertical stripes outside it, producing a clean compositional contrast. The page builds the SVG programmatically using vanilla JavaScript and the DOM API, with no external libraries. The code sets element dimensions from `window.innerWidth` and `window.innerHeight`, ensuring the artwork adapts to the viewport.