This example demonstrates the fundamental structure of a VizHub V3 visualization, starting from a blank canvas. It shows how the `main` function receives a DIV container and uses it as the mounting point for all visual output. The code implements a simple circular shape using basic SVG elements within the container, serving as a minimal "Hello World" for the runtime environment. The example highlights the V3 Runtime's continuous hot-reloading capability, where changes to the code instantly update the rendered visualization. It uses plain JavaScript and SVG APIs, with no external libraries, to establish the baseline for subsequent tutorials.