void playerStartPosition()
    {
        // Les joueurs choissisent leurs positions
        if (Input.GetMouseButtonDown(0) && !launch)
        {
            //Debug.Log("TOUCH");
            Vector3 pos = Input.mousePosition;    //screenPos to worldPos of mousePos
            pos.z = -Camera.main.transform.position.z;                 //Pos of player in 2D
            Vector3 playerPosInWorld = Camera.main.ScreenToWorldPoint(pos);

            //check vertical
            if (playerPosInWorld.y > 3.9f)
            {
                playerPosInWorld.y = 3.9f;
            }
            else if (playerPosInWorld.y < -3.9f)
            {
                playerPosInWorld.y = -3.9f;
            }

            if ((Input.mousePosition.x > (float)Screen.width / 2))
            {
                //check horizontal
                if (playerPosInWorld.x > 6.9f)
                {
                    playerPosInWorld.x = 6.9f;
                }
                else if (playerPosInWorld.x < 1.1f)
                {
                    playerPosInWorld.x = 1.1f;
                }

                /************************/
                if (Player1 == null)
                {
                    Player1 = (GameObject)Instantiate(PlayerPrefab, playerPosInWorld, new Quaternion());
                    Player1.name = "Player1";
                    scriptP1 = Player1.GetComponent<Player>();
                    scriptP1.setID(1);
                    scriptP1.ChangeAnimal(false);
                }
                else
                {
                    Player1.transform.position = playerPosInWorld;
                }
            }
            else
            {

                //check horizontal
                if (playerPosInWorld.x < -6.9f)
                {
                    playerPosInWorld.x = -6.9f;
                }
                else if (playerPosInWorld.x > -1.1f)
                {
                    playerPosInWorld.x = -1.1f;
                }
                /****************/

                if (Player2 == null)
                {
                    Player2 = (GameObject)Instantiate(PlayerPrefab, playerPosInWorld, new Quaternion());
                    Player2.name = "Player2";
                    scriptP2 = Player2.GetComponent<Player>();
                    scriptP2.setID(2);
                    scriptP2.ChangeAnimal(true);
                }
                else
                {

                    Player2.transform.position = playerPosInWorld;
                }
            }
        }
    }