This example recreates a Sol LeWitt-inspired wall drawing using D3.js and SVG. It renders 100 horizontal and 100 vertical rectangles across the full viewport, with each strip assigned a mask that clips it into a repeating pattern of D3’s built-in symbol shapes (circles, crosses, diamonds, and triangles). Two masks are applied: one uses black symbols on white, the other inverts the fill, creating contrast between the two overlapping grids. The code builds masks programmatically via a reusable `renderMask` function and leverages D3’s `range`, `symbol`, and `symbols` APIs to generate the clipped geometry.