This example reproduces a Sol LeWitt wall drawing as a generative grid of black horizontal and vertical stripes, whose visibility is controlled by mask layers. The SVG rendering uses custom d3 selections and joins to create bands of `rect` elements, while d3’s `symbol` and `symbols` APIs generate the paths used inside the masks. Two mask definitions, created with `renderMask`, alternate filled and empty regions based on symbol parity, producing an interlocking pattern of geometric shapes across the canvas. The composition adapts to the full browser window size.