This example displays a static "Hello World!" heading alongside a single circle rendered in SVG. The code uses plain HTML, CSS, and JavaScript without external libraries, with the message styled via a CSS class and the circle positioned using fixed `cx`, `cy`, and `r` attributes. It demonstrates the fundamental structure of an SVG-based visualization inside a React framework context, though no React components or data bindings are present. The visualization serves as a minimal starting point for building interactive graphics.