A grid of horizontal and vertical stripes alternates through two SVG masks to reveal a large star-shaped symbol at the center. The example demonstrates D3’s `symbol` and `symbols` API to generate the star path, combined with `mask` elements to create intersecting stripe patterns. Fifty rectangles are drawn in each direction using `d3.range` and `join`, with the horizontal set masked by an inverted white-on-black layer and the vertical set by its opposite. The result shows how layered masks can produce dynamic visual interferences.