layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x92
  RenderBlock {HTML} at (0,0) size 800x92
    RenderBody {BODY} at (8,16) size 784x60
      RenderBlock {P} at (0,0) size 784x60 [bgcolor=#FFFFFF] [border: (5px solid #00FF00)]
        RenderText {#text} at (21,21) size 733x18
          text run at (21,21) width 443: "This paragraph should have white background and a green thick solid "
          text run at (464,21) width 290: "border because it carries both classes t1 and t2"