Someone

public void spiral (int n, int ang, int e, int msec){
    for(int i=1,int color=1;i<=n;i++,color++){
      move(i*e);
      addAngle(ang);
      pause(msec);
       if(color>4)
       color=1;
          if(color == 1)
            setColor(Red);
          else if(color == 2)
           ....
           ....
    }
}