FIRST_LESSON
This example demonstrates the foundational setup of a VizHub Version 3 project, serving as a "Hello World" for the runtime environment. It shows a minimal HTML page that renders the text "HELLOWORLD!" inside a browser, using the exported `main` function from `index.js` as the entry point. This function receives a `container` DIV element and an `options` object with `state` and `setState` for immutable state management. Unlike previous versions, it requires no `index.html`, instead relying on the simplified `main` function structure. The example highlights the continuous hot reloading feature, where holding the Alt key and dragging numbers in the editor provides real-time updates to properties like font size.