This example demonstrates the simplest possible D3 version 6 setup: a page that displays the text “Hello D3 version 6” in the center of the viewport. The `index.html` file loads the D3 library from a CDN and applies a large font size via CSS. The `index.js` file imports the `select` function from D3 and uses `select('body').text(...)` to set the body’s text content, showing how to begin scripting with D3’s selection API.