This example reproduces a Sol LeWitt-style drawing by layering two sets of thin, uniformly spaced rectangles—one horizontal and one vertical—across the full browser window. The rectangles are masked by overlapping circles, creating a bold geometric interplay of lines and negative space. Built with D3 v3 and React, the code uses `d3.range` to generate 100 elements per axis, `svg.append` for the SVG structure, and custom mask definitions (`circle-mask` and `circle-mask-2`) to alternate white and black circular cutouts. The result is a clean, minimalist pattern that responds to the viewport size.