This example demonstrates a minimal D3 setup by displaying the text "Hello D3 version 7" in the center of the page using a large, 13-em font size. It imports the `select` function from D3 and uses it to target the empty `body` element, setting its text content directly. The code loads D3 version 7 from a CDN and relies on `bundle.js` to execute the main script, illustrating the basic structure for starting a D3 project without any data or complex visualizations.