fresh block2
This example presents an empty, full-screen visualization canvas. The HTML file includes only the basic page structure and a stylesheet that fixes the body to the viewport, with no JavaScript code or data loading implemented. It relies on the D3.js v4 library, which is included via a CDN link, but does not instantiate any D3 components or define any graphical output. The visualization appears as a blank white space, representing an initial template or placeholder for future D3-based work.