Six colored circles float over a pale blue background as D3 transitions animate them into view. Each circle scales from radius zero to its full size with staggered delays, then repositions itself at new coordinates using a faster linear ease. The example uses `selection.join()` to manage enter and update states, applying `transition()` with explicit durations and `easeLinear` to control the motion. Data is defined inline in JavaScript, rendered as SVG circles with distinct fills and 0.667 opacity.