This example reproduces a Sol LeWitt-style geometric drawing using straight lines and mask-based cutouts. The visualization shows a circular region in the center of the screen filled with dense horizontal and diagonal line patterns, while the surrounding area remains blank. The code creates two SVG masks with concentric circles to alternately reveal or hide line groups. Using native SVG elements, it generates 100 horizontal rectangles and 100 rotated diagonal rectangles, applying `mask` attributes to clip each set to the central circle.