protected boolean addLand(Point point)
	{
		if (point.x < 0 || point.x >= WIDTH || point.y < 0 || point.y >= HEIGHT)
			return false;
		else
		{	// random land tile (same as in constructor)
			int random = (int)(Math.random()*10);
			if (random == 2 || random == 9)
				campus[point.x][point.y] = new Tile(Tile.Type.GRASS);
			else if (random == 5)
				campus[point.x][point.y] = new Tile(Tile.Type.FLOWER);
			else
				campus[point.x][point.y] = new Tile(Tile.Type.LAND);
			return true;
		}
	}