This example overlays two sets of alternating horizontal and vertical stripes, each masked by a pattern of D3 symbols (such as circles, crosses, and diamonds) centered on the canvas. The first mask uses solid shapes on a white background, while the second inverts the fill, creating a contrasting lattice. Built with React and D3 v7, it uses `select`, `range`, `symbols`, and `symbol` to generate SVG elements, with `mask` applied to each stripe group to reveal the symbol shapes through the grid.