This example reproduces a Sol LeWitt art piece using D3 version 6 and SVG rendering. It displays two sets of overlapping thin rectangles—horizontal and vertical stripes—each masked to reveal a circular region in the center. The code uses `d3.select`, `d3.range`, and SVG `mask` elements with black-and-white circles to create the cutout effect, with the second mask inverting the visibility to alternate layer patterns across the full window size.