Five filled circles appear in a vertical row, centered at increasing x-coordinates with radii growing from 100 to 500. The example uses D3 v5 and SVG animation to demonstrate a staged transition: after a two-second delay, the circles become semi-transparent, scale to half their size, and gain a red stroke with a width of one em. All circles share a fixed y-coordinate and blue fill, with data provided as an inline array of objects.