layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x236
  RenderBlock {HTML} at (0,0) size 800x236
    RenderBody {BODY} at (8,8) size 784x220
layer at (8,8) size 220x220
  RenderBlock {DIV} at (0,0) size 220x220 [bgcolor=#FFFF00] [border: (10px solid #0000FF)]
    RenderBlock {DIV} at (10,10) size 200x200 [bgcolor=#008000]