A D3.js reproduction of a Sol LeWitt art piece renders a grid of horizontal and vertical striped rectangles across the full viewport. Two SVG masks, each combining a full-screen rectangle with a centered circle, restrict which stripes are visible. The first mask (circle-mask) reveals horizontal lines through a white circular opening on a black background, while the second (circle-mask-2) inverts the pattern for vertical lines. Using d3.select, range, and data joins, the code generates 100 rect elements per orientation, with masks applied via the mask attribute.