{"version":"1.0","type":"rich","title":"DFirstSteps","description":"A minimal SVG canvas fills the browser window with 100 thin horizontal rectangles, all clipped by a circular mask that leaves only the ring of the circle visible. The page uses D3's `select` and `range` to generate and append rectangles with programmatic `y` offsets and a full-width `width`, while an SVG `<mask>` element paints black to hide the interior. This results in a simple black-on-transparent ring effect centered on the viewport.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2e4abab64bf8440bb77c87d5fc323019?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}