layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x52
  LayoutBlockFlow {HTML} at (0,0) size 800x52
    LayoutBlockFlow {BODY} at (8,16) size 784x20
      LayoutBlockFlow {P} at (0,0) size 784x20 [color=#008000]
        LayoutText {#text} at (0,0) size 173x19
          text run at (0,0) width 173: "This sentence must be green."