--- /dev/null
+## Copyright (C) 2010 VZLU Prague, a.s.
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 3 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn{Function File} {B =} gameoflife (A, ngen, delay)
+## Runs the Conways' game of life from a given initial state for a given
+## number of generations and visualizes the process.
+## If ngen is infinity, the process is run as long as A changes.
+## Delay sets the pause between two frames. If zero, visualization is not done.
+## @end deftypefn
+
+function B = gameoflife (A, ngen, delay = 0.2)
+ B = A != 0;
+ igen = 0;
+ CSI = char ([27, 91]);
+
+ oldpso = page_screen_output (delay != 0);
+ unwind_protect
+
+ if (delay > 0)
+ puts (["\n", CSI, "s"]);
+ printf ("generation 0\n");
+ colorboard (! B);
+ pause (delay);
+ endif
+
+ while (igen < ngen)
+ C = conv2 (B, ones (3), "same") - B;
+ B1 = C == 3 | (B & C == 2);
+ igen++;
+ if (isinf (ngen) && all ((B1 == B)(:)))
+ break;
+ endif
+ B = B1;
+ if (delay > 0)
+ puts (["\n", CSI, "u"]);
+ printf ("generation %d\n", igen);
+ colorboard (! B);
+ pause (delay);
+ endif
+ endwhile
+
+ unwind_protect_cleanup
+ page_screen_output (oldpso);
+ end_unwind_protect
+
+endfunction