Sorry, it seems like your browser doesn't support all the features needed for this visualisation and I haven't made a progressively enhanced version which makes me a bad person :-(
Caveat: The specificity graph is a conceptual model not a tool. You really shouldn't be creating actual graphs of your CSS specificity.
That said, sometimes you do need to visualise your CSS's specificity graph to understand where you are at. If that's all you are doing and you know what they mean then crack on.
I want to use a linear scale (even though I know it will make the graph harder to understand):
I promise I'm not using IDs in my CSS: