A Sol LeWitt-inspired generative drawing fills the browser window with a grid of horizontal and vertical black lines. The piece uses D3 to render two sets of rectangles, each masked by a custom SVG mask. One mask reveals a pattern of geometric symbols—circles, squares, and triangles—while the other inverts the effect, creating a layered, intersecting composition. The masks are built with D3's `symbol` API, and the SVG elements are positioned using `range` and `selectAll` with `join`. The rendering is entirely SVG-based, with the artwork sized to the viewport.