This example shows a starfield animation that simulates traveling through space. The code generates 1,000 star elements with randomized positions, sizes, and speeds, then animates them using D3’s data join and `requestAnimationFrame`. Each star’s 3D translation and opacity update as it moves along the z-axis, with mouse movement dynamically shifting the perspective origin. The animation rebuilds on window resize, resetting all stars. It uses D3 v7 selections and DOM manipulation, CSS 3D transforms, and the native `requestAnimationFrame` API.