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 {DIV} at (0,0) size 784x19 [color=#FF0000]
        RenderText {#text} at (0,0) size 70x19
          text run at (0,0) width 70: "Hello world"
      RenderBlock {P} at (0,33) size 784x19
        RenderText {#text} at (0,0) size 218x19
          text run at (0,0) width 218: "The number of matched rules is: 1"