{"version":"1.0","type":"rich","title":"Fork of D3 Selections","description":"Two animated SVG panels show concentric circles whose radii and vertical positions pulse according to sine and cosine functions. Each frame shifts a time parameter, and the number of circles oscillates between 15 and 25. The example demonstrates D3’s data join pattern using `selection.selectAll`, `.data`, and `.join` within a `setInterval` animation loop. The code imports `select` and `range` from D3 v6 and renders the same visualization with black and white fills against contrasting backgrounds.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/667cb1e5ab284cfb9f965fb1d3dfc4f9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}