The example reproduces a Sol LeWitt–style composition using D3 and SVG, where 100 horizontal bars are layered over full-screen masks to create geometric patterns. It renders data generated from `d3.range(n)`, applying mask IDs via `selection.call(renderMask, ...)`. The masks use `d3.symbol` with symbol types from `symbols` to draw white shapes on black or inverted backgrounds, demonstrating D3 v7’s join and selection methods. The SVG output adapts to the viewport dimensions, with no external data source.