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
      RenderBlock {DIV} at (0,0) size 100x100 [bgcolor=#FF0000]
      RenderBlock {DIV} at (0,100) size 784x18
        RenderBlock (anonymous) at (0,0) size 784x18
          RenderText {TEXT} at (0,0) size 211x18
            text run at (0,0) width 211: "This should be below the red box"
        RenderBlock {DIV} at (0,18) size 784x0