This example generates an abstract geometric composition inspired by Sol LeWitt, where horizontal and vertical striped bands form a cross-like pattern across the full screen. Two SVG `<mask>` elements define circular cutouts—one with a black background and white circle, the other inverted—so that the stripes alternate visibility through the center. The code builds 100 horizontal and 100 vertical rectangles via plain JavaScript DOM manipulation, setting each rectangle’s `mask` attribute to either `url(#circle-mask)` or `url(#circle-mask2)`. No external libraries are used; the rendering relies entirely on native SVG and CSS, with dynamic window dimensions set through `window.innerWidth` and `window.innerHeight`.