The VizANN package is a free download from annevolve.sf.net. It contains a python program that graphically demonstrates a recurrent binary neural network. There is also an explanatory text file. Mitchell Timin -- "In theory, there is no difference between theory and practice. In practice, there is." http://annevolve.sourceforge.net is for those seeking something to do with their wetware. Humans may know that my email address is zenguy at shaw dot ca.