layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x600
  LayoutBlockFlow {HTML} at (0,0) size 800x600
    LayoutBlockFlow {BODY} at (8,8) size 784x570.56
      LayoutBlockFlow {H1} at (0,0) size 784x37 [bgcolor=#008000]
        LayoutText {#text} at (0,0) size 580x36
          text run at (0,0) width 580: "This text should have a green background."