layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x74
  RenderBlock {HTML} at (0,0) size 800x74
    RenderBody {BODY} at (8,8) size 784x58
      RenderBlock {DIV} at (0,0) size 784x58 [border: (2px solid #FF0000)]
        RenderText {TEXT} at (2,38) size 158x18
          text run at (2,38) width 158: "This image has a margin "
        RenderImage {IMG} at (210,2) size 50x50 [bgcolor=#008000]
        RenderText {TEXT} at (310,38) size 36x18
          text run at (310,38) width 36: " on it."
