String rule(char a, char b, char c){
String rval = "0";
if(a!=c){
rval = "1";
}
return rval;
}
char fancyGet(int index){//gets a value from old at a given position
if(index>=0){
return old.charAt(index%(old.length()));
} else {
return old.charAt(old.length()-1);
}
}
void run(){//the method that executes the rule
old=program;//save the old program and begin mutation
program = "";//empty the current program
for(int i = 0; i < old.length(); i++){
program = program + rule(fancyGet(i-1),fancyGet(i),fancyGet(i+1));
}
}