layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x578
      RenderBlock {P} at (0,0) size 784x20 [border: (1px solid #FF0000) none]
        RenderText {#text} at (0,0) size 264x19
          text run at (0,0) width 264: "Nothing should appear below the red line."