This example demonstrates a dynamic, organic border using CSS animations. A white, irregularly-shaped blob continuously morphs through different border-radius configurations, including a perfect circle at the midpoint, before shifting to a yellow hue. The animation is driven by the `borderrr` keyframes within the stylesheet. The page uses a minimal HTML structure with an SVG element and a `bundle.js` script, though the primary visual effect is achieved through pure CSS, not JavaScript or D3. The code references D3 v5 via CDN but the actual animation relies on CSS `@keyframes` and the `border-radius` property.