SVG start
This example demonstrates the basic structure of an SVG visualization, showing a single red circle positioned within a coordinate system. The rendering relies on native SVG elements embedded directly in the HTML document, without any JavaScript libraries or data sources. The circle is defined using the `<circle>` tag with explicit `cx`, `cy`, and `r` attributes for its center coordinates and radius. While the code attempts to set the fill color via a `color` attribute, that property is not valid in SVG, so the circle would appear black by default, highlighting a common syntax error for beginners.