layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x50
  RenderBlock {HTML} at (0,0) size 800x50
    RenderBody {BODY} at (8,16) size 784x18
      RenderBlock {P} at (0,0) size 784x18
        RenderInline (anonymous) at (0,0) size 10x18 [bgcolor=#00FF00]
          RenderText {TEXT} at (0,0) size 10x18
            text run at (0,0) width 10: "T"
        RenderText {TEXT} at (10,0) size 401x18
          text run at (10,0) width 401: "he first letter of this paragraph should have a green background."
