This example reproduces a Sol LeWitt-inspired drawing using D3.js to render SVG rectangles in a browser. It shows a grid of alternating vertical and horizontal bars that are masked to create a circular focal point, with bars inside the circle appearing inverted relative to those outside. The code uses D3’s `select` and `range` APIs to generate and join the rectangles, while custom SVG masks (`circle-mask` and `circle-cutout-mask`) control visibility. The visualization resizes to the full window and uses only the built-in D3 library (v6.6.1).