layer at (0,0) size 800x600
  RenderView 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
layer at (400,0) size 100x100
  RenderBlock (positioned) {DIV} at (400,0) size 100x100 [bgcolor=#FF0000]
layer at (400,0) size 200x100
  RenderBlock (positioned) {DIV} at (400,0) size 200x100 [bgcolor=#008000]