This example reproduces a Sol LeWitt art piece using D3.js and SVG rendering. It displays a grid of horizontal and vertical black lines that form a geometric pattern across the full viewport, with a circular white mask creating a negative-space shape in the center. The code uses D3 selections with `range`, `join`, and `attr` to generate repeated rectangles on each axis, while masks are built with `append('mask')` and SVG circles. The rendering is entirely procedural, generating 100 lines per direction from data arrays rather than loading external data.