layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (20,20) size 780x100
  LayoutBlockFlow {HTML} at (20,20) size 780x100
    LayoutBlockFlow {BODY} at (0,0) size 780x100
      LayoutBlockFlow {DIV} at (0,0) size 100x100 [bgcolor=#FF0000]
layer at (20,20) size 100x100
  LayoutBlockFlow (positioned) {DIV} at (20,20) size 100x100 [bgcolor=#008000]