{"version":"1.0","type":"rich","title":"Test block","description":"This example shows three red vertical bars on an SVG canvas, positioned at fixed intervals with heights of 10, 40, and 70 pixels. The bars are drawn from hardcoded data arrays rather than the included CSV file. Using D3 v4, the code selects SVG rectangles via `selectAll(\"rect\")`, binds data with `.data()`, and applies attributes such as `x`, `y`, `height`, and `width`. It also appends text elements, though the text setup is incomplete. The canvas is 200 by 200 pixels, with bars 30 pixels wide and a 20-pixel offset.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-2b70ae75ca463083cec8c3441f7e9a77?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}