Hello,

          I would like to know how to create these pictures. I have looked at all available pymol tutorials online but am not able to find anything that would help me create these pictures. Thank you very much for your help. Here are the links to the pictures:

               https://lh3.googleusercontent.com/-0TJhgxEIAIM/TsvUewyNAoI/AAAAAAAAAic/kFcIE2shs8A/s830/pi%2Bstacking.jpg

               https://lh4.googleusercontent.com/-0TJhgxEIAIM/TsvUewyNAoI/AAAAAAAAAic/kFcIE2shs8A/w200-h168-k/pi%2Bstacking.jpg

               https://lh5.googleusercontent.com/-Rbz_lQp9aFM/TsvUjPPWLDI/AAAAAAAAAik/qAyuQmmQhIU/s912/pic3.png