This visualization displays a grid of thin horizontal and vertical rectangles, with a circular region in the center revealed by two mask layers. The first set of horizontal strips and vertical strips are generated using `d3.select`, `d3.range`, and the `.join` method to create SVG `rect` elements. Two SVG masks—one with a white circle on black, the other with a black circle on white—are applied to create the central circular aperture, resulting in an intersecting crosshatch pattern.