This example shows a full-screen SVG visualization made up of 100 vertical rectangles arranged side by side, each with a fixed width and height equal to the browser window. The code uses plain JavaScript and the `document.createElementNS` API to generate SVG `<rect>` elements, setting their `x` positions in increments of 20 pixels. It relies on `window.innerWidth` and `window.innerHeight` to determine the viewport size, and creates a static, non-interactive pattern that fills the entire screen.