This example reproduces a minimalist Sol LeWitt drawing using programmatically generated vertical bars. It fills the browser viewport with 100 thin SVG rectangles, evenly spaced 20 pixels apart and spanning the full window height. The code uses the raw Document Object Model (DOM) API with `createElementNS` to construct SVG elements directly, setting viewport dimensions from `window.innerWidth` and `window.innerHeight`. No external libraries are used; the rendering relies purely on vanilla JavaScript and CSS.