A single heading reading “Hello, world!” centers itself on the page, initially appearing upside down and nearly invisible before rotating upright and scaling to full size over two seconds. The page uses D3 v7’s selection, style manipulation, and transition API with a duration of 2000 milliseconds to animate the transform property from `rotate(-180deg) scale(0.001, 0.001)` to its normal state. No external data is loaded; the visualization is rendered entirely through DOM elements styled with CSS transforms via D3’s `transition().style()`.