This example loads a CSV file of CSS named colors, parses it with the `d3.csv` function, and renders a colored square for each row using React’s `useEffect` and `useState`. The squares’ background colors come from the `RGB hex value` column, with a fixed width and height of 100 pixels. While loading, a large “Loading …” message is displayed. The console logs the first row, and the data is fetched from a GitHub Gist URL. The example demonstrates asynchronous data retrieval and simple color-based visualization with D3’s CSV parser and React’s state management.