Fill in the area at Incanter

Question

Can I create a filled area in a chart using Incanter (Clojure)? I can not find anything about this in the manual.

For example, let's say I have the following function to create a simple scatter plot:

   (defn daycurve-test []
      (doto (scatter-plot (range 0 20) (range 0 20))
        (add-polygon [[0 0] [0 10] [10 10] [10 0]])
        view))

This will draw a scatter plot and a black rectangle on the screen. Is there a way to fill this rectangle using, for example, red?