layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x32
  RenderBlock {HTML} at (0,0) size 800x32
    RenderBody {BODY} at (8,8) size 784x16
      RenderBlock {ADDRESS} at (0,0) size 784x16 [bgcolor=#00FF00]
        RenderText {TEXT} at (0,0) size 354x16
          text run at (0,0) width 354: "This address element should have a green background."
