This example displays the text “Hello D3 version 7” in massive, centered type on a blank page, demonstrating a minimal setup for D3 v7. It uses `d3.select` to target the `body` element and the `.text` method to insert content, with styling controlled via CSS in an inline style block. The page loads D3 from a CDN and runs the script from a separate bundled file, showing the basic structure for any new D3 project.