Fork of D3 Transitions
Six colored circles enter a pale green canvas, each growing from a zero radius to its target size with staggered delays. The animation then repeatedly relocates the circles to new positions, using rapid linear tweens for the updates. This fork of D3 Transitions demonstrates the `transition` API and its `duration`, `ease`, and `delay` methods. Elements are managed through `selectAll`'s `.join()` with explicit enter, update, and exit handlers, which shrink circles on exit before removal. The dataset is hardcoded with coordinates, radii, and hex fills for six objects.