code: public void addKickCommand(int power, int direction) {
          StringBuilder buf = new StringBuilder();
          buf.append("(kick ");
          buf.append(power);
          buf.append(' ');
          buf.append(direction);
          buf.append(')');
          fifo.add(fifo.size(), buf.toString());
      }
docs: This command accelerates the ball with the given power in the given direction.
  
  @param power Power is between minpower (-100) and maxpower (+100).
  @param direction Direction is relative to the body of the player.