enum grounds {
	GROUND_NONE,
	GROUND_WATER,
	GROUND_GRASS,
	GROUND_ROAD,
};

enum items {
	ITEM_NONE,
	ITEM_CARGO,
	ITEM_TRUCK,
	ITEM_HOUSE,
	ITEM_BUTTON,
	ITEM_DROPPOINT,
	ITEM_BRIDGE,
};

enum colors {
	COLOR_NONE,
	COLOR_RED,
	COLOR_GREEN,
	COLOR_BLUE,
	COLOR_YELLOW,
	COLOR_WHITE,
	COLOR_PURPLE,
};