This example renders a generative art piece inspired by Sol LeWitt, displaying a grid of vertical black bars on a white background. A circular mask, defined via SVG’s `<mask>` element, restricts the bars to appear only within a centered circle, creating a stark, geometric contrast. The code uses raw JavaScript and SVG APIs (`document.createElementNS`, `setAttribute`) to construct the shapes dynamically, with the mask composed of a white rectangle and a black circle. The bar spacing and width are fixed by loop parameters, producing a repeating pattern across the full viewport.