This example reproduces a Sol LeWitt-inspired geometric pattern using D3. Horizontal and vertical bands of rectangles are drawn across the entire viewport, each filtered through a mask that reveals a large circular shape in the center. The code uses `d3.select`, `d3.range`, and `d3.symbol` with `d3.symbols[1]` to generate the circular path, while `d3.join` applies rectangle data points. The SVG rendering is driven by a mask system where one mask inverts the circle to cut out the central area, creating an optical interaction of lines.