This example demonstrates a minimal D3 version 6 setup, rendering the text “Hello D3 version 666” in the center of the page at a large font size. The code uses the `select` function from the `d3` module to target the body element and writes the text via its `.text()` method. The page loads D3 from a CDN and includes a separate `bundle.js` script, while the output is styled with a 10em font size and centered alignment using plain CSS.