This example reproduces a Sol LeWitt wall drawing as an interactive web page. It shows a grid of horizontal and vertical stripes that are visible only within a centered square, creating a stark black-and-white geometric pattern. The rendering is achieved with dynamically generated SVG elements, using two SVG `mask` definitions to clip the striped rectangles to the square’s boundaries. The code constructs the masks and stripes procedurally with JavaScript, sizing everything to the full browser window.