This demo is a minimal D3 starter page, displaying the text "aer" prominently in the center of the viewport with a font size of 13em. It uses D3 version 6, loaded via a CDN, and the `select` method from the `d3` module to target the body element and set its text content. The work is built as a fork of a D3 starter template, with the example’s code split between an `index.html` file and a separate `index.js` module bundled into `bundle.js`.