This example shows a large, dark square filled with two distinct path-based patterns created using the textures library. Each pattern is generated by a different custom path function and applied to the square as a fill. The code uses `textures.paths()` to define the patterns and `svg.call()` to register them, then assigns the texture URLs to the rectangle via `.style("fill", t1.url())`. The rendering is done with D3 v5 and SVG, with the square drawn as a single `rect` element.