{"version":"1.0","type":"rich","title":"First D3 Thing","description":"A full-screen SVG composition layers 100 horizontal and 100 vertical strips, each masked by a central circle. Two SVG masks (`circle-mask` and `circle-mask-2`) define the visible regions: the first reveals a black circle on a white background, while the second inverts it. The strips alternate orientation, with horizontal bands shown through the first mask and vertical bands through the second, creating a cross-hatched grid with a circular cutout in the center. The code uses D3's `selection` API to build the scene by appending elements to the SVG container, with dimensions tied to the browser window size.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d5c11d52eb7c4d73a456fb9365458691?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}