diff --git a/mods/xpanes/init.lua b/mods/xpanes/init.lua
index 60ec68c..a3f7828 100644
--- a/mods/xpanes/init.lua
+++ b/mods/xpanes/init.lua
@@ -1,175 +1,186 @@
 xpanes = {}
 
 local function rshift(x, by)
-  return math.floor(x / 2 ^ by)
+	return math.floor(x / 2 ^ by)
 end
 
 local directions = {
-    {x = 1, y = 0, z = 0},
-    {x = 0, y = 0, z = 1},
-    {x = -1, y = 0, z = 0},
-    {x = 0, y = 0, z = -1},
+	{x = 1, y = 0, z = 0},
+	{x = 0, y = 0, z = 1},
+	{x = -1, y = 0, z = 0},
+	{x = 0, y = 0, z = -1},
 }
 
-local function update_pane(pos,name)
-    if minetest.get_node(pos).name:find("xpanes:"..name) == nil then
-        return
-    end
-    local sum = 0
-    for i = 1, 4 do
-        local node = minetest.get_node({x = pos.x + directions[i].x, y = pos.y + directions[i].y, z = pos.z + directions[i].z})
-	local pane_num = minetest.registered_nodes[node.name].groups.pane or 0
-        if (minetest.registered_nodes[node.name].walkable ~= false and minetest.registered_nodes[node.name].drawtype ~= "nodebox") or pane_num > 0 then
-            sum = sum + 2 ^ (i - 1)
-        end
-    end
-    if sum == 0 then
-        sum = 15
-    end
-    minetest.set_node(pos, {name = "xpanes:"..name.."_"..sum})
+local function update_pane(pos, name)
+	if not minetest.get_node(pos).name:find("^xpanes:"..name) then
+		return
+	end
+	local sum = 0
+	for i, dir in pairs(directions) do
+		local node = minetest.get_node({
+			x = pos.x + dir.x,
+			y = pos.y + dir.y,
+			z = pos.z + dir.z
+		})
+		local def = minetest.registered_nodes[node.name]
+		local pane_num = def and def.groups.pane or 0
+		if pane_num > 0 or not def or (def.walkable ~= false and
+				def.drawtype ~= "nodebox") then
+			sum = sum + 2 ^ (i - 1)
+		end
+	end
+	if sum == 0 then
+		sum = 15
+	end
+	minetest.set_node(pos, {name = "xpanes:"..name.."_"..sum})
 end
 
-local function update_nearby(pos,n)
-    if n == nil then n = minetest.get_node(pos) end
-    if not n or not n.name then return end
-    local name = string.sub(n.name,8,10)
-    if name ~=  "bar" then name = "pane" end
-    for i = 1,4 do
-        update_pane({x = pos.x + directions[i].x, y = pos.y + directions[i].y, z = pos.z + directions[i].z}, name)
-    end
+local function update_nearby(pos, node)
+	node = node or minetest.get_node(pos)
+	if node.name:sub(1, 7) ~= "xpanes:" then return end
+	local underscore_pos = node.name:find("_") or 0
+	local name = node.name:sub(8, underscore_pos - 1)
+	for i, dir in pairs(directions) do
+		update_pane({
+			x = pos.x + dir.x,
+			y = pos.y + dir.y,
+			z = pos.z + dir.z
+		}, name)
+	end
 end
 
-local half_blocks = {
-    {0, -0.5, -1/32, 0.5, 0.5, 1/32},
-    {-1/32, -0.5, 0, 1/32, 0.5, 0.5},
-    {-0.5, -0.5, -1/32, 0, 0.5, 1/32},
-    {-1/32, -0.5, -0.5, 1/32, 0.5, 0}
+local half_boxes = {
+	{0,     -0.5, -1/32, 0.5,  0.5, 1/32},
+	{-1/32, -0.5, 0,     1/32, 0.5, 0.5},
+	{-0.5,  -0.5, -1/32, 0,    0.5, 1/32},
+	{-1/32, -0.5, -0.5,  1/32, 0.5, 0}
 }
 
-local full_blocks = {
-    {-0.5, -0.5, -1/32, 0.5, 0.5, 1/32},
-    {-1/32, -0.5, -0.5, 1/32, 0.5, 0.5}
+local full_boxes = {
+	{-0.5,  -0.5, -1/32, 0.5,  0.5, 1/32},
+	{-1/32, -0.5, -0.5,  1/32, 0.5, 0.5}
 }
 
-local sb_half_blocks = {
-    {0, -0.5, -0.06, 0.5, 0.5, 0.06},
-    {-0.06, -0.5, 0, 0.06, 0.5, 0.5},
-    {-0.5, -0.5, -0.06, 0, 0.5, 0.06},
-    {-0.06, -0.5, -0.5, 0.06, 0.5, 0}
+local sb_half_boxes = {
+	{0,     -0.5, -0.06, 0.5,  0.5, 0.06},
+	{-0.06, -0.5, 0,     0.06, 0.5, 0.5},
+	{-0.5,  -0.5, -0.06, 0,    0.5, 0.06},
+	{-0.06, -0.5, -0.5,  0.06, 0.5, 0}
 }
 
-local sb_full_blocks = {
-    {-0.5, -0.5, -0.06, 0.5, 0.5, 0.06},
-    {-0.06, -0.5, -0.5, 0.06, 0.5, 0.5}
+local sb_full_boxes = {
+	{-0.5,  -0.5, -0.06, 0.5,  0.5, 0.06},
+	{-0.06, -0.5, -0.5,  0.06, 0.5, 0.5}
 }
---register panes and bars
+
 function xpanes.register_pane(name, def)
-for i = 1, 15 do
-    local need = {}
-    local cnt = 0
-    for j = 1, 4 do
-        if rshift(i, j - 1) % 2 == 1 then
-            need[j] = true
-            cnt = cnt + 1
-        end
-    end
-    local take = {}
-    local take2 = {}
-    if need[1] == true and need[3] == true then
-        need[1] = nil
-        need[3] = nil
-        table.insert(take, full_blocks[1])
-        table.insert(take2, sb_full_blocks[1])
-    end
-    if need[2] == true and need[4] == true then
-        need[2] = nil
-        need[4] = nil
-        table.insert(take, full_blocks[2])
-        table.insert(take2, sb_full_blocks[2])
-    end
-    for k in pairs(need) do
-        table.insert(take, half_blocks[k])
-        table.insert(take2, sb_half_blocks[k])
-    end
-    local texture = def.textures[1]
-    if cnt == 1 then
-        texture = def.textures[1].."^"..def.textures[2]
-    end
-    minetest.register_node("xpanes:"..name.."_"..i, {
-        drawtype = "nodebox",
-        tiles = {def.textures[3], def.textures[3], texture},
-        paramtype = "light",
-        groups = def.groups,
-        drop = "xpanes:"..name,
-	sounds = def.sounds,
-        node_box = {
-            type = "fixed",
-            fixed = take
-        },
-        selection_box = {
-            type = "fixed",
-            fixed = take2
-        }
-    })
-end
+	for i = 1, 15 do
+		local need = {}
+		local cnt = 0
+		for j = 1, 4 do
+			if rshift(i, j - 1) % 2 == 1 then
+				need[j] = true
+				cnt = cnt + 1
+			end
+		end
+		local take = {}
+		local take2 = {}
+		if need[1] == true and need[3] == true then
+			need[1] = nil
+			need[3] = nil
+			table.insert(take, full_boxes[1])
+			table.insert(take2, sb_full_boxes[1])
+		end
+		if need[2] == true and need[4] == true then
+			need[2] = nil
+			need[4] = nil
+			table.insert(take, full_boxes[2])
+			table.insert(take2, sb_full_boxes[2])
+		end
+		for k in pairs(need) do
+			table.insert(take, half_boxes[k])
+			table.insert(take2, sb_half_boxes[k])
+		end
+		local texture = def.textures[1]
+		if cnt == 1 then
+			texture = def.textures[1].."^"..def.textures[2]
+		end
+		minetest.register_node("xpanes:"..name.."_"..i, {
+			drawtype = "nodebox",
+			tiles = {def.textures[3], def.textures[3], texture},
+			paramtype = "light",
+			groups = def.groups,
+			drop = "xpanes:"..name,
+			sounds = def.sounds,
+			node_box = {
+				type = "fixed",
+				fixed = take
+			},
+			selection_box = {
+				type = "fixed",
+				fixed = take2
+			}
+		})
+	end
 
-minetest.register_node("xpanes:"..name, def)
+	minetest.register_node("xpanes:"..name, def)
 
-minetest.register_craft({
-	output = "xpanes:"..name.." 16",
-	recipe = def.recipe
-})
+	minetest.register_craft({
+		output = "xpanes:"..name.." 16",
+		recipe = def.recipe
+	})
 end
 
 minetest.register_on_placenode(update_nearby)
 minetest.register_on_dignode(update_nearby)
 
 xpanes.register_pane("pane", {
-    description = "Glass Pane",
-    tiles = {"xpanes_space.png"},
-    drawtype = "airlike",
-    paramtype = "light",
-    sunlight_propagates = true,
-    walkable = false,
-    pointable = false,
-    diggable = false,
-    buildable_to = true,
-    air_equivalent = true,
-    textures = {"default_glass.png","xpanes_pane_half.png","xpanes_white.png"},
-    inventory_image = "default_glass.png",
-    wield_image = "default_glass.png",
-    sounds = default.node_sound_glass_defaults(),
-    groups = {snappy=2,cracky=3,oddly_breakable_by_hand=3,pane=1},
-    on_construct = function(pos)
-	update_pane(pos, "pane")
-    end,
-    recipe = {
+	description = "Glass Pane",
+	tiles = {"xpanes_space.png"},
+	drawtype = "airlike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	air_equivalent = true,
+	textures = {"default_glass.png","xpanes_pane_half.png","xpanes_white.png"},
+	inventory_image = "default_glass.png",
+	wield_image = "default_glass.png",
+	sounds = default.node_sound_glass_defaults(),
+	groups = {snappy=2, cracky=3, oddly_breakable_by_hand=3, pane=1},
+	on_construct = function(pos)
+		update_pane(pos, "pane")
+	end,
+	recipe = {
 		{'default:glass', 'default:glass', 'default:glass'},
-        {'default:glass', 'default:glass', 'default:glass'}
+		{'default:glass', 'default:glass', 'default:glass'}
 	}
 })
 
 xpanes.register_pane("bar", {
-    description = "Iron bar",
-    tiles = {"xpanes_space.png"},
-    drawtype = "airlike",
-    paramtype = "light",
-    sunlight_propagates = true,
-    walkable = false,
-    pointable = false,
-    diggable = false,
-    buildable_to = true,
-    air_equivalent = true,
-    textures = {"xpanes_bar.png","xpanes_bar.png","xpanes_space.png"},
-    inventory_image = "xpanes_bar.png",
-    wield_image = "xpanes_bar.png",
-    groups = {snappy=2,cracky=3,oddly_breakable_by_hand=3,pane=1},
-    sounds = default.node_sound_stone_defaults(),
-    on_construct = function(pos)
-	update_pane(pos, "bar")
-    end,
-    recipe = {
+	description = "Iron bar",
+	tiles = {"xpanes_space.png"},
+	drawtype = "airlike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	air_equivalent = true,
+	textures = {"xpanes_bar.png","xpanes_bar.png","xpanes_space.png"},
+	inventory_image = "xpanes_bar.png",
+	wield_image = "xpanes_bar.png",
+	groups = {snappy=2, cracky=3, oddly_breakable_by_hand=3, pane=1},
+	sounds = default.node_sound_stone_defaults(),
+	on_construct = function(pos)
+		update_pane(pos, "bar")
+	end,
+	recipe = {
 		{'default:steel_ingot', 'default:glass', 'default:glass'},
-        {'default:glass', 'default:glass', 'default:glass'}
+		{'default:glass', 'default:glass', 'default:glass'}
 	}
 })
+