layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x92
  RenderBlock {HTML} at (0,0) size 800x92
    RenderBody {BODY} at (8,16) size 784x68
      RenderBlock {P} at (0,0) size 784x18
        RenderText {TEXT} at (0,0) size 193x18
          text run at (0,0) width 193: "There should be no red below."
      RenderBlock {DIV} at (0,50) size 784x18 [bgcolor=#FF0000]
        RenderBlock {DIV} at (0,0) size 784x18
          RenderBlock {DIV} at (0,0) size 784x18
            RenderBlock {DIV} at (0,0) size 784x18 [color=#FFFFFF] [bgcolor=#008000]
              RenderText {TEXT} at (0,0) size 163x18
                text run at (0,0) width 163: "This line should be green."
