code: public void addTurnCommand(int angle) {
          StringBuilder buf = new StringBuilder();
          buf.append("(turn ");
          buf.append(angle);
          buf.append(')');
          fifo.add(fifo.size(), buf.toString());
      }
docs: This command will turn the players body in degrees relative to their
  current direction.
  
  @param angle Angle to turn (between -180 and +180).