Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 267 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 110 0+0+100] children: not-inline
      BlockContainer <div> at [8,8] [0+0+0 784 0+0+0] [0+0+0 110 0+0+0] children: not-inline
        BlockContainer <div.square.white> at [8,8] floating [0+0+0 100 0+0+0] [0+0+0 100 0+0+0] [BFC] children: not-inline
        BlockContainer <div.clearfix> at [8,108] [0+0+0 10 0+0+774] [9999+0+0 10 0+0+100] children: not-inline
        BlockContainer <div.square.black> at [8,218] floating [0+0+0 49 0+0+0] [0+0+0 49 0+0+0] [BFC] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x267]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x110]
      PaintableWithLines (BlockContainer<DIV>) [8,8 784x110]
        PaintableWithLines (BlockContainer<DIV>.square.white) [8,8 100x100]
        PaintableWithLines (BlockContainer<DIV>.clearfix) [8,108 10x10]
        PaintableWithLines (BlockContainer<DIV>.square.black) [8,218 49x49]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x267] (z-index: auto)
