private void addFirst(){
		Node first = body.get(0);
		int x = first.getX();
		int y = first.getY();
		switch (direction) {
		case UP:
			y--;
			break;
		case DOWN:
			y++;
			break;
		case LEFT:
			x--;
			break;
		case RIGHT:
			x++;
			break;
		}
		System.out.println("x="+x+"    y="+y);
		Node _first = new Node(x, y);
		if(!isDead(_first)){
			body.add(0, _first);
		}
	}