layer at (0,0) size 800x600
  RenderCanvas 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 [bgcolor=#EEEEEE]
      RenderBlock {DIV} at (24,24) size 736x536 [color=#FFFFFF] [bgcolor=#008000]
        RenderText {TEXT} at (0,0) size 516x18
          text run at (0,0) width 516: "The green div should fill the content area (except for a bit of padding on all sides)."