A grid of thin, closely spaced horizontal and vertical black bars on a white background forms a woven, striped pattern. The bars are drawn only within the bounds of a central circle, creating the illusion of a textured disc. The code uses the D3.js `select`, `append`, and `data` APIs with `join` to generate the SVG rectangles. Two SVG masks, `circle-mask` and `circle-mask-2`, are defined to combine the bar patterns with a circular region, reproducing the geometric aesthetic of a Sol LeWitt art piece.