{"version":"1.0","type":"rich","title":"test","description":"A grid of thin horizontal and vertical bars covers the full screen, creating intersecting lines that are visible only through a central circular mask, leaving the corners dark. The bars are drawn as SVG rectangles using D3’s `selectAll().join()` pattern with `range()`-generated data. Two masks define the view: one white circle reveals the inner bars, while a second mask with an inverted circle hides the outer bars’ center. The example uses D3 v7 and SVG rendering with no external data source.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"","width":960,"height":500,"cache_age":3600}