This example generates an abstract geometric composition inspired by Sol LeWitt using D3.js, rendering horizontally and vertically striped rectangles across the full browser window. It employs SVG masks with `d3.symbol` and `d3.range` to create two distinct mask patterns—one containing the seven symbol types and another with a duplicated symbol—which selectively reveal the layered line grids. The `select`, `append`, and `join` APIs structure the SVG elements, while the `call` method applies the mask-rendering functions. The code uses D3 version 6.6.1 and dynamically sizes the output to the viewport.