{"version":"1.0","type":"rich","title":"fresh block","description":"A red rectangle transitions to blue over three seconds on a blank SVG canvas. The animation uses D3’s `transition().duration(3000).ease(\"bounce\")` to change the rectangle’s fill style, demonstrating basic shape rendering and tweening with d3.js 3.5.5. The code directly appends an SVG `rect` element to the body and logs a message to the console. No data source is involved; the example focuses solely on a single animated visual primitive.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-9c203809ba4e57ed5675?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}