This example demonstrates how to build a visualization with D3 v5 and ES6 modules in VizHub. It loads D3 via UNPKG and uses `import { select } from 'd3'` to manipulate the DOM, setting the text content of a `div` element via `select('#message').text(message)`. A local ES6 module (`myMessage.js`) exports a string that is displayed. The example also includes a CSS stylesheet for layout, showing a basic template for combining external libraries, modular JavaScript, and styling in a single project.