This example creates a generative geometric composition inspired by Sol LeWitt, displayed as horizontal and vertical stripes across the screen. Two SVG masks—one with a white circle on black, another with a black circle on white—reveal alternating sets of striped rectangles, producing a crosshatch pattern where the stripes overlap. The visualization uses vanilla JavaScript with the DOM API to construct SVG elements dynamically, setting the width and height based on the browser window. It shows how masking and nested loops can generate a structured, Op-Art-like visual effect without external libraries.