private Case getNextCase() {
	      Case tete = this.listSerp.getFirst();
	      switch (this.direction) {
	            case VERS_LE_HAUT:
	                  return new Case(tete.getIndiceX(), tete.getIndiceY() - 1);
	            case VERS_LA_DROITE:
	                  return new Case(tete.getIndiceX() + 1, tete.getIndiceY());
	            case VERS_LE_BAS:
	                  return new Case(tete.getIndiceX(), tete.getIndiceY() + 1);
	            case VERS_LA_GAUCHE:
	                  return new Case(tete.getIndiceX() - 1, tete.getIndiceY());
	      }
	      return null;
	}