layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x34
  RenderBlock {HTML} at (0,0) size 800x34
    RenderBody {BODY} at (8,8) size 784x18
      RenderBlock {ADDRESS} at (0,0) size 784x18 [bgcolor=#00FF00]
        RenderText {TEXT} at (0,0) size 349x18
          text run at (0,0) width 349: "This address element should have a green background."