local slit = {
	{"stone", "Stone", "default_stone", "default:stone"},
	{"sandstone", "Sandstone", "default_sandstone", "default:sandstone"},
	{"desertstone", "Desert Stone", "default_desert_stone", "default:desert_stone"},
	{"dungeonstone", "Dungeon Stone", "castle_dungeon_stone", "castle:dungeon_stone"},
}

local grp = {cracky = 3}

for n = 1, #slit do

	-- arrow slits

	minetest.register_node("castle:arrowslit_"..slit[n][1], {
		drawtype = "nodebox",
		description = slit[n][2].." Arrowslit",
		tiles = {slit[n][3]..".png"},
		groups = grp,
		sounds = default.node_sound_defaults(),
		paramtype = "light",
		paramtype2 = "facedir",
		node_box = {
		type = "fixed",
		fixed = {
			{-0.500000,-0.375000,-0.500000,-0.062500,0.375000,-0.312500},
			{0.062500,-0.375000,-0.500000,0.500000,0.375000,-0.312500},
			{-0.500000,0.375000,-0.500000,0.500000,0.500000,-0.312500},
			{-0.500000,-0.500000,-0.500000,0.500000,-0.375000,-0.312500},
			},
		},
		selection_box = {
			type = "fixed",
			fixed = {
				{-0.500000,-0.500000,-0.500000,0.500000,0.500000,-0.312500},
			},
		},
	})

	minetest.register_craft({
		output = "castle:arrowslit_"..slit[n][1].." 6",
		recipe = {
		{slit[n][4],"", slit[n][4]},
		{slit[n][4],"", slit[n][4]},
		{slit[n][4],"", slit[n][4]} },
	})

	-- murder holes

	minetest.register_node("castle:hole_"..slit[n][1], {
		drawtype = "nodebox",
		description = slit[n][2].." Murder Hole",
		tiles = {slit[n][3]..".png"},
		groups = grp,
		sounds = default.node_sound_defaults(),
		paramtype = "light",
		paramtype2 = "facedir",
		node_box = {
			type = "fixed",
				fixed = {
					{-8/16,-8/16,-8/16,-4/16,8/16,8/16},
					{4/16,-8/16,-8/16,8/16,8/16,8/16},
					{-4/16,-8/16,-8/16,4/16,8/16,-4/16},
					{-4/16,-8/16,8/16,4/16,8/16,4/16},
				},
			},
	})

	minetest.register_craft({
		output = "castle:hole_"..slit[n][1].." 4",
		recipe = {
		{"",slit[n][4], "" },
		{slit[n][4],"", slit[n][4]},
		{"",slit[n][4], ""} },
	})

	grp = {cracky = 3, not_in_craft_guide = 1}

end