public void endOfTurn() {
        if( playerInTurn == Player.BLUE ){

            playerInTurn = Player.RED;

            endOfRound();

        } else if ( playerInTurn == Player.RED  ){

            playerInTurn = Player.BLUE;

        }
        for( GameObserver observer : gameObservers){
            observer.turnEnds(playerInTurn, age);
        }
    }