This visualization reproduces a Sol LeWitt art piece using D3.js and SVG rendering. It shows a grid of horizontal and vertical bars overlaid with a circular mask, creating a pattern where the bars are visible only within the circle’s boundary. The code uses D3’s `select`, `range`, and `.join` API to generate and append rectangles, while two SVG masks (`circle-mask` and `circle-mask-2`) define the circular cutout. The layout is computed from the window dimensions, filling the full viewport with the pattern.