layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock {DIV} at (0,0) size 784x18 [bgcolor=#00FF00]
        RenderText {TEXT} at (0,0) size 279x18
          text run at (0,0) width 279: "The background of this div should be green."
