Well, haven't heard from anyone not to do this...so here goes. The name (subject) was selected because there will be at irregular intervals par snips as I get motivated. No formula on this one.....it is embedded in the basic fractint program, tetrate, I believe. This is the first one in my archives. It is really >old<, but has been reworked, both in resolution and color. Thanks for your interest. David M Fisher sunfish@intercom.net