layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x134
  RenderBlock {HTML} at (0,0) size 800x134
    RenderBody {BODY} at (8,8) size 784x118
      RenderBlock (anonymous) at (0,0) size 784x18
        RenderText {#text} at (0,0) size 471x18
          text run at (0,0) width 244: "You should see a green square below. "
          text run at (244,0) width 227: "There should be no red on the page."
      RenderBlock {DIV} at (0,18) size 100x100 [bgcolor=#008000]
