diff --git a/function.lua b/function.lua
new file mode 100644
index 0000000..0e493e1
--- /dev/null
+++ b/function.lua
@@ -0,0 +1,176 @@
+local S = minetest.get_translator("surface_effect")
+
+surface_effect.dump = function(o)
+    if type(o) == 'table' then
+        local s = '{ '
+        for k,v in pairs(o) do
+            if type(k) ~= 'number' then k = '"'..k..'"' end
+            s = s .. '['..k..'] = ' .. surface_effect.dump(v) .. ','
+        end
+        return s .. '} '
+    else
+        return tostring(o)
+    end
+end
+
+surface_effect.showLogo = function(player)
+    local name = player:get_player_name()
+
+    if surface_effect.nplayer[name]['logo'] == 'off' then
+        local id = player:hud_add({
+            name = "logo",
+            hud_elem_type = "image",
+            position = {x = 0.2, y = 0.9},
+            scale = {
+                x = -30,
+                y = -10
+            },
+            text = "surfaces_effect_Mine_apocalypse.png"
+        })
+
+        surface_effect.nplayer[name]['logo'] = "on"
+
+        minetest.log("action", name .. " status logo " .. surface_effect.nplayer[name]['logo'] .. " id " .. id)
+    end
+end
+
+surface_effect.setHud = function(player)
+    local name = player:get_player_name()
+
+    if type(surface_effect.nplayer[name]) == 'nil' then
+        surface_effect.nplayer[name] = {
+            id = false,
+            radiation_damage = "OFF",
+            id_varning_text = false,
+            logo = 'off',
+        }
+
+        minetest.log("action", "Load nplayer: " .. surface_effect.dump(surface_effect.nplayer))
+    end
+end
+
+surface_effect.checkHazmat = function(player)
+    local armor = armor:get_weared_armor_elements (player)
+
+    if armor ~= 'nil' then
+        if type(armor) == 'nil' then return false end
+
+        if armor.head == "hazmat_suit:suit_hazmat" then
+            return true
+        else
+            return false
+        end
+    end
+
+    return false
+end
+
+surface_effect.radiaton_off = function(player)
+    local name = player:get_player_name()
+
+    if surface_effect.nplayer[name]["radiation_damage"] == "ON" then
+        player:hud_remove(surface_effect.nplayer[name]['id'])
+        player:hud_remove(surface_effect.nplayer[name]['id_varning_text'])
+        surface_effect.nplayer[name]["radiation_damage"] = "OFF"
+        surface_effect.nplayer[name]["id_varning_text"] = nil
+    end
+end
+
+--Защита от радиацйии
+surface_effect.technic_forcefield_radiation_protection = function(pos, player)
+    if not minetest.get_modpath("technic") then return false end
+
+    local radius = 20
+    local protectors = minetest.find_nodes_in_area(
+            {x = pos.x - radius , y = pos.y - radius , z = pos.z - radius},
+            {x = pos.x + radius , y = pos.y + radius , z = pos.z + radius},
+            {"technic:forcefield_emitter_on"})
+
+    if #protectors > 0 then
+        local npos = protectors[1]
+        local meta = minetest.get_meta(npos)
+        local pos1 = vector.subtract(pos, npos)
+        local range = meta:get_int("range")
+
+        if math.round(pos1.x) < range and math.round(pos1.x) > 0 - range and
+                math.round(pos1.y) < range and math.round(pos1.y) > 0 - range and
+                math.round(pos1.z) < range and math.round(pos1.z) > 0 - range
+        then
+            --minetest.chat_send_all(dump((0 - range)))
+            surface_effect.radiaton_off(player)
+            return true
+        end
+
+        return false
+    else
+        return false
+    end
+end
+
+su.rediationDomage = function (player, pos)
+    local name = player:get_player_name()
+
+    if pos.y > -40 and pos.y < 1500 then
+        if surface_effect.technic_forcefield_radiation_protection(pos,player) == true then
+            return
+        end
+
+        minetest.sound_play("surface_effect_radiaciya",{
+            gain = 1.0,
+            to_player = name,
+        })
+
+        persistent_api.add_persistent_effect({
+            name = "damage_player", -- identifier
+            object = player, -- affected object
+            duration = 10, -- this effect will last 10 seconds
+            effect = function(player)
+
+                if surface_effect.nplayer[name]['radiation_damage'] == "OFF" then
+                    local id = player:hud_add({
+                        name = "Radiation effect",
+                        hud_elem_type = "image",
+                        position = {x = 0.5, y = 0.5},
+                        scale = {
+                            x = -100,
+                            y = -110
+                        },
+                        text = "surface_effect_rad.png"
+                    })
+
+                    local idtext = player:hud_add({
+                        name = "Attention! Radiation ",
+                        hud_elem_type = "text",
+                        position  = {x = 1, y = 0.5},
+                        offset    = {x = -180, y = 0},
+                        text      = S("Attention! High levels of radiation."),
+                        alignment = -1,
+                        scale     = { x = 50, y = 10},
+                        number    = 0xFF0000,
+                    })
+
+                    minetest.after(1.52, function(name, id)
+                        local player = minetest.get_player_by_name(name)
+                        if player then
+                            --player:hud_remove(id)
+                        else
+                            -- player has left the game
+                        end
+                    end, player:get_player_name(), id)
+
+                    surface_effect.nplayer[name]['id'] = id
+                    surface_effect.nplayer[name]["radiation_damage"] = "ON"
+                    surface_effect.nplayer[name]["id_varning_text"] = idtext
+                end
+
+                if surface_effect.checkHazmat(player) == false then
+                    player:set_hp(player:get_hp()-0.1) -- damage the player one half heart
+                end
+
+            end,
+            persistence = 2, -- every 0.1 seconds for 10 seconds the previous function will be run.
+        })
+    else
+        surface_effect.radiaton_off(player)
+    end
+end
diff --git a/init.lua b/init.lua
index d43d3e3..a779765 100644
--- a/init.lua
+++ b/init.lua
@@ -1,144 +1,10 @@
-local S = minetest.get_translator("surface_effect")
-
 su = {}
-surface_effect = {}
-
+surface_effect = {
+	nplayer = {}
+}
 local timer = 0
-local nplayer = {}
 
-local function dump(o)
-   if type(o) == 'table' then
-      local s = '{ '
-      for k,v in pairs(o) do
-         if type(k) ~= 'number' then k = '"'..k..'"' end
-         s = s .. '['..k..'] = ' .. dump(v) .. ','
-      end
-      return s .. '} '
-   else
-      return tostring(o)
-   end
-end
-
-surface_effect.showLogo = function(player)
-	local name = player:get_player_name()
-
-	if nplayer[name]['logo'] == 'off' then
-		local id = player:hud_add({
-			name = "logo",
-			hud_elem_type = "image",
-			position = {x = 0.2, y = 0.9},
-			scale = {
-				x = -30,
-				y = -10
-			},
-			text = "surfaces_effect_Mine_apocalypse.png"
-		})
-
-		nplayer[name]['logo'] = "on"
-
-		minetest.log("action", name .. " status logo " .. nplayer[name]['logo'] .. " id " .. id)
-	end
-end
-
-surface_effect.setHud = function(player)
-	local name = player:get_player_name()
-
-	if type(nplayer[name]) == 'nil' then
-		nplayer[name] = {
-			id = false,
-			radiation_damage = "OFF",
-			id_varning_text = false,
-			logo = 'off',
-		}
-
-		minetest.log("action", "Load nplayer: " .. dump(nplayer))
-	end
-end
-
-surface_effect.checkHazmat = function(player)
-	local armor = armor:get_weared_armor_elements (player)
-
-	if armor ~= 'nil' then
-		if type(armor) == 'nil' then return false end
-
-		if armor.head == "hazmat_suit:suit_hazmat" then
-			return true
-		else
-			return false
-		end
-	end
-
-	return false
-end
-
-su.rediationDomage = function (player, pos)
-	local name = player:get_player_name()
-
-	if pos.y > -40 and pos.y < 1500 then
-		minetest.sound_play("surface_effect_radiaciya",{
-			gain = 1.0,
-			to_player = name,
-		})
-
-		persistent_api.add_persistent_effect({
-			name = "damage_player", -- identifier
-			object = player, -- affected object
-			duration = 10, -- this effect will last 10 seconds
-			effect = function(player)
-
-				if nplayer[name]['radiation_damage'] == "OFF" then
-					local id = player:hud_add({
-						name = "Radiation effect",
-						hud_elem_type = "image",
-						position = {x = 0.5, y = 0.5},
-						scale = {
-							x = -100,
-							y = -110
-						},
-						text = "surface_effect_rad.png"
-					})
-
-					local idtext = player:hud_add({
-						name = "Attention! Radiation ",
-						hud_elem_type = "text",
-						position  = {x = 1, y = 0.5},
-						offset    = {x = -180, y = 0},
-						text      = S("Attention! High levels of radiation."),
-						alignment = -1,
-						scale     = { x = 50, y = 10},
-						number    = 0xFF0000,
-					})
-
-					minetest.after(1.52, function(name, id)
-						local player = minetest.get_player_by_name(name)
-						if player then
-							--player:hud_remove(id)
-						else
-							-- player has left the game
-						end
-					end, player:get_player_name(), id)
-
-					nplayer[name]['id'] = id
-					nplayer[name]["radiation_damage"] = "ON"
-					nplayer[name]["id_varning_text"] = idtext
-				end
-
-				if surface_effect.checkHazmat(player) == false then
-					player:set_hp(player:get_hp()-0.1) -- damage the player one half heart
-				end
-
-			end,
-			persistence = 2, -- every 0.1 seconds for 10 seconds the previous function will be run.
-		})
-	else
-		if nplayer[name]["radiation_damage"] == "ON" then
-			player:hud_remove(nplayer[name]['id'])
-			player:hud_remove(nplayer[name]['id_varning_text'])
-			nplayer[name]["radiation_damage"] = "OFF"
-			nplayer[name]["id_varning_text"] = nil
-		end
-	end
-end
+dofile(minetest.get_modpath("surface_effect") .. "/function.lua")
 
 minetest.register_globalstep(function(dtime)
 	-- every 5 seconds
@@ -156,7 +22,6 @@ minetest.register_globalstep(function(dtime)
 		if object then
 			local pos = object:get_pos()
 			su.rediationDomage(player, pos)
-			surface_effect.showLogo(player)
 			--minetest.chat_send_all(dump(areas:getAreasAtPos(pos)))
 		end
     end
@@ -166,6 +31,8 @@ end)
 minetest.register_on_newplayer(function(player)
 	surface_effect.setHud(player)
 
+	surface_effect.showLogo(player)
+
 	if minetest.get_modpath("hazmat_suit") then
 		player:get_inventory():add_item("main", 'hazmat_suit:suit_hazmat 1')
 	end
@@ -177,10 +44,12 @@ end)
 
 minetest.register_on_joinplayer(function(player, last_login)
 	surface_effect.setHud(player)
+	surface_effect.showLogo(player)
+
 	local name = player:get_player_name()
 	local pos = player:get_pos()
 
-	nplayer[name]['logo'] = 'off'
+	surface_effect.nplayer[name]['logo'] = 'off'
 end )
 
 minetest.register_on_prejoinplayer(function(name, ip)
diff --git a/mod.conf b/mod.conf
index eadb6b4..604a586 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,6 +1,7 @@
 name = surface_effect
-description = surface effect test
+description = surface effect
 depends = default, persistent_effects, mobs_monster
+optional_depends = technic
 min_minetest_version = 5.7
 title = Surface Effect
 release = 0
\ No newline at end of file