Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x0 children: inline
      BlockContainer <div#container> at (28,28) content-size 500x400 positioned [BFC] children: inline
        TextNode <#text>
        BlockContainer <div#red> at (58,58) content-size 100x100 positioned [BFC] children: not-inline
        TextNode <#text>
        BlockContainer <div#green> at (358,98) content-size 100x100 positioned [BFC] children: not-inline
        TextNode <#text>
        BlockContainer <div#blue> at (48,308) content-size 100x100 positioned [BFC] children: not-inline
        TextNode <#text>
        BlockContainer <div#yellow> at (408,308) content-size 100x100 positioned [BFC] children: not-inline
        TextNode <#text>
      TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x0]
      PaintableWithLines (BlockContainer<DIV>#container) [8,8 540x440]
        PaintableWithLines (BlockContainer<DIV>#red) [48,48 120x120]
        PaintableWithLines (BlockContainer<DIV>#green) [358,98 100x100]
        PaintableWithLines (BlockContainer<DIV>#blue) [48,308 100x100]
        PaintableWithLines (BlockContainer<DIV>#yellow) [408,308 100x100]
