This example shows four black vertical bars of varying heights arranged across a 600-by-500 SVG canvas, creating a simple ranking or categorical comparison. No JavaScript libraries are used; the visualization consists solely of static SVG `<rect>` elements defined directly in the HTML markup. Each rectangle has an explicit `x`, `y`, `width`, and `height` attribute, with heights descending from left to right. The data source is embedded in the markup itself, and the rendering relies on the browser’s native SVG support without any interaction or animation.