{"version":"1.0","type":"rich","title":"Practice","description":"A smiling face built from D3.js SVG shapes demonstrates sequential animation with transition chains. The yellow circle, eyes, and arc-based mouth are drawn using D3 selections and the `d3.arc` helper, while two rectangular eyebrows animate upward and back down over four seconds. The movement uses chained `transition().duration()` calls on the eyebrow group's transform attribute, illustrating basic DOM manipulation and timed updates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/405c6c402ece44e4a6da1297e3929d8c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}