From Hal:
Proper cash will produce a symmetrical pattern. By choosing good CA rules, the patterns will be different for each bill, some nicer than others, leading to attractive fractal-looking patterns for many bills. When you wanted to "look at your money" you could run the program on the digital cash. People might even trade for especially attractive bills. ..................... This sounds really cool, if it could work that way. I can imagine a large screen wall display of these fractal images continuously running in color in the entertainment room, as a kaleidescopic display of all my cash holdings.......if the patterns begin to repeat themselves too soon, it means I don't have very much in the digibank. :>) So there couldn't be anything else which would produce these same patterns and thus be confused for the original or actual? Blanc