This example demonstrates SVG fundamentals by manipulating paragraphs and page styling using D3.js v7. It shows how D3 selections can change text color dynamically, first setting all paragraphs to blue, then applying random HSL colors to each paragraph. The code also changes the body background to black and loads D3 from a CDN. The rendering approach uses direct DOM manipulation through d3.select and d3.selectAll, with no external data source or complex SVG shape generation visible.