This is the program Excite! writen by D. Griffeath to explore the time evolution of excitable media. It is Freeware. This program runs on IBM PC's under MS-DOS References: Fisch R., Gravner, J. Griffeath, D. Threshold range scaling of excitable cellurar automata Statistics and Computing 1 R. Durret Some New games for your computer Nonlinear Science Today 1 p. 1-7 (1991) To get a working version, cut all the explanation material and put it in a file -- say exitefile - Then do uudecode excitefile uncompress excite.tar tar -xf excite.tar This should create a directory with all the executables and all the auxiliary files. ------------------cut here----------------------------------