This example demonstrates a basic HTML page that uses D3.js (version 5) to render a simple SVG scene. It draws a large circle in the center of a purple-background SVG, with two additional circles layered on top at the same position, though their intended roles as eyes are not visually distinct. The code uses D3's `select` and `append` APIs to create and style the SVG elements, and the page includes an HTML "Hello HTML" text. The data source is an empty `data.csv` file, and the rendering approach is SVG.