There is a particular user formula 'Carr1723' which has occupied me the past three years. There are two function controls in FE with 42 options. That makes 1764 combinations. I thought it might be fun to see if a spiral could be found in each combination. I've only managed about 10% so far ( Dec 2007 ) but some interesting forms have appeared.

Preferences change. These are some of my current likes, not always good, just like looking at them.