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+2d-rewriter is a cellular automata simulator.
+
+ Key features
+
+Declarative input language for rules and initial patterns definition.
+
+Ability to emulate Conway's "Life Game" via proper rules specification.
+
+Ability to demonstrate self replicating loops.
+
+Patterns are tried in 4 orientations.
+
+Cell directions are defined against the pattern orientation.
+
+Total number of rules can be substantially decreased by using
+sets and defining patterns using variables.
+
+Required run time environment is a minimal X window system installation
+on an POSIX-compatible system (*BSD/Linux/Mac OS X/Cygwin/...).