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 784x584
      RenderFieldSet {FIELDSET} at (2,0) size 116x72 [border: (2px groove #C0C0C0)]
        RenderBlock {LEGEND} at (14,0) size 88x18
          RenderText {#text} at (2,0) size 84x18
            text run at (2,0) width 84: "Number One"
        RenderBlock (anonymous) at (14,23) size 88x37
          RenderText {#text} at (0,0) size 81x18
            text run at (0,0) width 81: "Hello world."
          RenderBR {BR} at (80,14) size 1x0
          RenderText {#text} at (0,18) size 81x18
            text run at (0,18) width 81: "Hello world."
      RenderText {#text} at (119,41) size 5x18
        text run at (119,41) width 5: " "
      RenderFieldSet {FIELDSET} at (125,18) size 117x54 [border: (2px groove #C0C0C0)]
        RenderBlock {LEGEND} at (14,0) size 89x18
          RenderText {#text} at (2,0) size 85x18
            text run at (2,0) width 85: "Number Two"
        RenderBlock (anonymous) at (14,23) size 89x19
          RenderText {#text} at (0,0) size 81x18
            text run at (0,0) width 81: "Hello world."
      RenderText {#text} at (0,0) size 0x0