diff --git a/maidroid/api.lua b/maidroid/api.lua
index d4e0f8a..5484818 100644
--- a/maidroid/api.lua
+++ b/maidroid/api.lua
@@ -95,8 +95,8 @@ function maidroid.maidroid.get_nearest_player(self, range_distance)
 	return player
 end
 
--- maidroid.maidroid.get_front_node returns a node that exists in front of the maidroid.
-function maidroid.maidroid.get_front_node(self)
+-- maidroid.maidroid.get_front returns a position in front of the maidroid.
+function maidroid.maidroid.get_front(self)
 	local direction = self:get_look_direction()
 	if math.abs(direction.x) >= 0.5 then
 		if direction.x > 0 then	direction.x = 1	else direction.x = -1 end
@@ -110,7 +110,12 @@ function maidroid.maidroid.get_front_node(self)
 		direction.z = 0
 	end
 
-	local front = vector.add(vector.round(self.object:getpos()), direction)
+	return vector.add(vector.round(self.object:getpos()), direction)
+end
+
+-- maidroid.maidroid.get_front_node returns a node that exists in front of the maidroid.
+function maidroid.maidroid.get_front_node(self)
+	local front = self:get_front()
 	return minetest.get_node(front)
 end
 
@@ -269,7 +274,7 @@ do
 			local luaentity = obj:get_luaentity()
 
 			if maidroid.is_maidroid(luaentity.name) then
-				self.object:set_attach(obj, "Arm_R", {x = 0.075, y = 0.60, z = -0.20}, {x = 0, y = 90, z = 0})
+				self.object:set_attach(obj, "Arm_R", {x = 0.065, y = 0.50, z = -0.15}, {x = -45, y = 0, z = 0})
 				self.object:set_properties{textures={"maidroid:dummy_empty_craftitem"}}
 				return
 			end
@@ -624,6 +629,7 @@ function maidroid.register_maidroid(product_name, def)
 		get_core                     = maidroid.maidroid.get_core,
 		get_core_name                = maidroid.maidroid.get_core_name,
 		get_nearest_player           = maidroid.maidroid.get_nearest_player,
+		get_front                    = maidroid.maidroid.get_front,
 		get_front_node               = maidroid.maidroid.get_front_node,
 		get_look_direction           = maidroid.maidroid.get_look_direction,
 		set_animation                = maidroid.maidroid.set_animation,
diff --git a/maidroid_core/cores/torcher.lua b/maidroid_core/cores/torcher.lua
new file mode 100644
index 0000000..9b84563
--- /dev/null
+++ b/maidroid_core/cores/torcher.lua
@@ -0,0 +1,136 @@
+------------------------------------------------------------
+-- Copyright (c) 2016 tacigar. All rights reserved.
+-- https://github.com/tacigar/maidroid
+------------------------------------------------------------
+
+local state = {IDLE = 0, ACCOMPANY = 1}
+
+local PLACE_TIME = 4
+
+local function on_start(self)
+	self.state = state.IDLE
+	self.object:setacceleration{x = 0, y = -10, z = 0}
+	self.object:setvelocity{x = 0, y = 0, z = 0}
+	self.time_counter = -1
+	self.is_placing = false
+end
+
+local function on_stop(self)
+	self.state = nil
+	self.object:setvelocity{x = 0, y = 0, z = 0}
+	self:set_animation(maidroid.animation_frames.STAND)
+	self.time_counter = nil
+	self.is_placing = nil
+end
+
+local function is_dark(pos)
+	local light_level = minetest.get_node_light(pos)
+	return light_level <= 5
+end
+
+local function on_step(self, dtime)
+	if self.is_placing then
+		if self.time_counter >= PLACE_TIME then
+			self.time_counter = -1
+			if self.state == state.IDLE then
+				self:set_animation(maidroid.animation_frames.STAND)
+			elseif self.state == state.ACCOMPANY then
+				self:set_animation(maidroid.animation_frames.WALK)
+			end
+
+			local owner = minetest.get_player_by_name(self.owner_name)
+			local wield_stack = self:get_wield_item_stack()
+			local front = self:get_front()
+
+			local pointed_thing = {
+				type = "node",
+				under = vector.add(front, {x = 0, y = -1, z = 0}),
+				above = front,
+			}
+
+			if wield_stack:get_name() == "default:torch" then
+				local res_stack, success = minetest.item_place_node(wield_stack, owner, pointed_thing)
+				if success then
+					res_stack:take_item(1)
+					self:set_wield_item_stack(res_stack)
+				end
+			end
+			self.is_placing = false
+		else
+			self.time_counter = self.time_counter + 1
+		end
+	end
+
+	local player = self:get_nearest_player(10)
+	if player == nil then
+		self:set_animation(maidroid.animation_frames.STAND)
+		return
+	end
+
+	local position = self.object:getpos()
+	local player_position = player:getpos()
+	local direction = vector.subtract(player_position, position)
+	local velocity = self.object:getvelocity()
+
+	if vector.length(direction) < 3 then
+		if self.state == state.ACCOMPANY then
+			self:set_animation(maidroid.animation_frames.STAND)
+			self.state = state.IDLE
+			self.object:setvelocity{x = 0, y = velocity.y, z = 0}
+		end
+
+		if not self.is_placing then
+			local front = self:get_front() -- if it is dark, set touch.
+			local wield_stack = self:get_wield_item_stack()
+
+			if is_dark(front)
+			and (wield_stack:get_name() == "default:torch"
+			or self:move_main_to_wield(function (itemname) return itemname == "default:torch" end)) then
+				self.time_counter = 0
+				self.is_placing = true
+				self:set_animation(maidroid.animation_frames.MINE)
+			end
+		end
+
+	else
+		if self.state == state.IDLE then
+			self:set_animation(maidroid.animation_frames.WALK)
+			self.state = state.ACCOMPANY
+		end
+		self.object:setvelocity{x = direction.x, y = velocity.y, z = direction.z} -- TODO
+
+		if not self.is_placing then
+			local front = self:get_front() -- if it is dark, set touch.
+			local wield_stack = self:get_wield_item_stack()
+
+			if is_dark(front)
+			and (wield_stack:get_name() == "default:torch"
+			or self:move_main_to_wield(function (itemname) return itemname == "default:torch" end)) then
+				self.time_counter = 0
+				self.is_placing = true
+				self:set_animation(maidroid.animation_frames.WALK_MINE)
+			end
+		end
+	end
+	self:set_yaw_by_direction(direction)
+
+	-- if maidroid is stoped by obstacle, the maidroid must jump.
+	if velocity.y == 0 and self.state == state.ACCOMPANY then
+		local front_node = self:get_front_node()
+		if front_node.name ~= "air" and minetest.registered_nodes[front_node.name] ~= nil
+		and minetest.registered_nodes[front_node.name].walkable then
+			self.object:setvelocity{x = direction.x, y = 5, z = direction.z}
+		end
+	end
+end
+
+-- register a definition of a new core.
+maidroid.register_core("maidroid_core:torcher", {
+	description      = "maidroid core : torcher",
+	inventory_image  = "maidroid_core_torcher.png",
+	on_start         = on_start,
+	on_stop          = on_stop,
+	on_resume        = on_start,
+	on_pause         = on_stop,
+	on_step          = on_step,
+})
diff --git a/maidroid_core/init.lua b/maidroid_core/init.lua
index 7d16105..7932b0b 100644
--- a/maidroid_core/init.lua
+++ b/maidroid_core/init.lua
@@ -12,6 +12,7 @@ dofile(maidroid_core.modpath .. "/cores/_aux.lua")
 dofile(maidroid_core.modpath .. "/cores/empty.lua")
 dofile(maidroid_core.modpath .. "/cores/basic.lua")
 dofile(maidroid_core.modpath .. "/cores/farming.lua")
+dofile(maidroid_core.modpath .. "/cores/torcher.lua")
 if pdisc then
 	dofile(maidroid_core.modpath .. "/cores/ocr.lua")
 end
diff --git a/maidroid_core/textures/maidroid_core_torcher.png b/maidroid_core/textures/maidroid_core_torcher.png
new file mode 100644
index 0000000..d0284ee
Binary files /dev/null and b/maidroid_core/textures/maidroid_core_torcher.png differ
diff --git a/maidroid_core/xcf/maidroid_core_torcher.xcf b/maidroid_core/xcf/maidroid_core_torcher.xcf
new file mode 100644
index 0000000..2ca5a5a
Binary files /dev/null and b/maidroid_core/xcf/maidroid_core_torcher.xcf differ
diff --git a/maidroid_tool/core_writer.lua b/maidroid_tool/core_writer.lua
index daa7ebd..9b6898f 100644
--- a/maidroid_tool/core_writer.lua
+++ b/maidroid_tool/core_writer.lua
@@ -9,6 +9,7 @@ do -- register core writer
 		["dye:red"]    = "maidroid_core:basic",
 		["dye:yellow"] = "maidroid_core:farming",
 		["dye:white"]  = "maidroid_core:ocr",
+		["dye:orange"] = "maidroid_core:torcher"
 	}
 
 	local node_box = {