This example shows a simple SVG diagram: a gray base circle overlaid with a lighter inner circle and a small triangular arrow pointing upward from the center. The visualization is created directly in HTML using inline SVG elements, including `<circle>`, `<path>`, and a `<g>` group with a `transform` attribute for positioning. No external libraries or data sources are involved; the shapes are hard-coded with fixed coordinates, sizes, and colors like `#e8e8e8` and `#4d4d4d`. It demonstrates the basic structure of SVG graphics within a React-compatible HTML page.