class Brain{
  PVector[] directions;
  int step=0;
  
  //Constructor
  Brain(int size){
    directions=new PVector[size];
    
    //random fill
    for(int i=0; i<directions.length; i++){
      float randomAngle=random(2*PI);
      directions[i]=PVector.fromAngle(randomAngle);
    }
  }
  
  //Clone brain
  Brain clone(){
    Brain cpy=new Brain(directions.length);
    for(int i=0; i<directions.length; i++){
      cpy.directions[i]=directions[i].copy();
    }
    
    return cpy;
  }
  
  //Mutate brain
  void mutate(){
    float mutateRate=0.01;
    for(int i=0; i<directions.length; i++){
      if(random(1)<mutateRate){
        float randomAngle=random(2*PI);
        directions[i]=PVector.fromAngle(randomAngle);
      }
    }
  }
  
  //get next step
  PVector next(){
    if(step<directions.length){
      step++;
      return directions[step-1];
    }
    else{
      return null;
    }
  }
}