This example demonstrates a basic bar chart rendered entirely as static SVG elements, with a grey background and four dark bars of varying heights. The chart uses raw SVG markup within an HTML page, with each bar drawn using a `<rect>` element that specifies its x and y position, width, height, and fill color. The visualization relies on manual coordinate and dimension values rather than any data-binding or layout algorithm, showing the fundamental building blocks of SVG-based graphics in a React-free, bare-minimum HTML context. The chart’s values are hard-coded, so it does not respond to data changes or user interaction.