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 784x584
      LayoutBlockFlow (anonymous) at (0,0) size 784x20
        LayoutText {#text} at (0,0) size 539x19
          text run at (0,0) width 291: "You should see a 100x100 green square below. "
          text run at (290,0) width 249: "If you see any red then the test has failed."
      LayoutBlockFlow {DIV} at (0,20) size 100x100 [bgcolor=#008000]