This example reproduces a Sol LeWitt wall drawing using SVG and JavaScript. A circular mask isolates a group of horizontal stripes, while un-masked vertical lines extend across the full canvas. The code generates 100 horizontal rectangles with a set height and 100 vertical rectangles, positioning them in a grid pattern via the `createElementNS` API. The mask, defined with a `circle` element, limits the horizontal stripes to a central circular region, creating a subtle intersection effect between the two sets of lines.