This example reproduces a Sol LeWitt drawing using purely procedural SVG generation. It displays a full-screen field of evenly spaced horizontal bars, with a circular area in the center where the bars are masked out to reveal the background. The code creates the SVG dynamically via the DOM API, using `document.createElementNS` to construct each rectangle and a circular SVG `<mask>` to define the central void. No external libraries are used, and the rendering is entirely based on the browser's viewport dimensions.