Very good japhy. Your reconstruction looks almost identical (including variable names) to my original pre-obfuscated version, with the exception of your 'trick'. :) I think I did put the generation of e into its own subroutine in my original code just for modularity, but that's about the only real difference.

I read about the Google billboard and thought the concept was kind of fun. It gave me a new thought to toy with, and this was the outcome.