Something like this: http://3.bp.blogspot.com/-ryzFfMYaEV4/TZist3z0dxI/AAAAAAAAAE...
It turns out to be more complicated than one (or than I) would think at first.
Something like this: http://3.bp.blogspot.com/-ryzFfMYaEV4/TZist3z0dxI/AAAAAAAAAE...