This example demonstrates a minimal D3.js setup that loads a message from a local ES6 module and displays it in the browser using `d3.select` to set the text content of a div. The code imports the `select` function from D3 v5 via UNPKG, imports a string from `myMessage.js`, and applies CSS styling from `styles.css`. It shows how to combine CDN-loaded libraries, local modules, and external stylesheets in a simple single-page visualization gallery.