private Box getNextBox() {
		Box head = this.list.getFirst();
		switch (this.direction) {
		case HIGH:
			return new Box(head.getIndiceX(), head.getIndiceY() - 1);
		case RIGHT:
			return new Box(head.getIndiceX() + 1, head.getIndiceY());
		case LOW:
			return new Box(head.getIndiceX(), head.getIndiceY() + 1);
		case LEFT:
			return new Box(head.getIndiceX() - 1, head.getIndiceY());
		}
		return null;
	}