This example recreates a Sol LeWitt wall drawing using two layered masks to generate a grid of repeated geometric patterns. The SVG renders alternating vertical and horizontal stripes, where each stripe is clipped by a hexagon-based mask created with nested polygons. The code uses raw Document Object Model (DOM) methods like `document.createElementNS` to build the SVG structure, with no external libraries. The pattern emerges from the intersection of the two masks, producing a dynamic optical effect across the 1000 by 700 pixel canvas.