diff --git a/init.lua b/init.lua
index 8863958..8418458 100644
--- a/init.lua
+++ b/init.lua
@@ -3,7 +3,7 @@
 
 basic_robot = {};
 ------  SETTINGS  --------
-basic_robot.call_limit = 48; -- how many execution calls per script run allowed
+basic_robot.call_limit = {50,200,1500,10^9}; -- how many execution calls per script run allowed, for auth levels 0,1,2 (normal, robot, puzzle, admin)
 basic_robot.entry_count = 2 -- how many robots ordinary player can have
 basic_robot.advanced_count = 16 -- how many robots player with robot privs can have
 basic_robot.radius = 32; -- divide whole world into blocks of this size - used for managing events like keyboard punches
@@ -25,7 +25,7 @@ basic_robot.bad_inventory_blocks = { -- disallow taking from these nodes invento
 
 basic_robot.http_api = minetest.request_http_api(); 
 
-basic_robot.version = "2018/12/11a";
+basic_robot.version = "2018/12/24a";
 
 basic_robot.gui = {}; local robogui = basic_robot.gui -- gui management
 basic_robot.data = {}; -- stores all robot related data
@@ -490,7 +490,7 @@ function getSandboxEnv (name)
 		env.code.run = function(script)
 			if basic_robot.data[name].authlevel < 3 then
 				local err = check_code(script);
-				script = preprocess_code(script);
+				script = preprocess_code(script, basic_robot.call_limit[basic_robot.data[name].authlevel+1]);
 				if err then 
 					minetest.chat_send_player(name,"#ROBOT CODE CHECK ERROR : " .. err) 
 					return 
@@ -658,7 +658,7 @@ end
 
 --todo: 2018/12 this suddenly stopped working, wtf??
 
-preprocess_code = function(script)  -- version 07/24/2018
+preprocess_code = function(script, call_limit)  -- version 07/24/2018
 
 	--[[ idea: in each local a = function (args) ... end insert counter like:
 	local a = function (args) counter_check_code ... end 
@@ -669,8 +669,8 @@ preprocess_code = function(script)  -- version 07/24/2018
 	script="_c_ = 0; " .. script;
 
 	-- process script to insert call counter in every function
-	local _increase_ccounter = " _c_ = _c_ + 1; if _c_ > " .. basic_robot.call_limit .. 
-	" then error(\"Execution count \".. _c_ .. \" exceeded ".. basic_robot.call_limit .. "\") end; "
+	local _increase_ccounter = " _c_ = _c_ + 1; if _c_ > " .. call_limit .. 
+	" then _G.error(\"Execution count \".. _c_ .. \" exceeded ".. call_limit .. "\") end; "
 	
 	local i1=0; local i2 = 0;
 	local found = true;
@@ -747,11 +747,13 @@ local function setCode( name, script ) -- to run script: 1. initSandbox 2. setCo
 	local cor = false;
 	if string.sub(script,1,11) == "--coroutine" then cor = true end
 	
-	if basic_robot.data[name].authlevel<3 then -- not admin
+	local authlevel = basic_robot.data[name].authlevel;
+	
+	if authlevel<3 then -- not admin
 		err = check_code(script);
-		script = preprocess_code(script);
+		script = preprocess_code(script,basic_robot.call_limit[authlevel+1]);
 	elseif cor then
-		script = preprocess_code(script); --  coroutines need ccounter reset or 'infinite loops' fail after limit
+		script = preprocess_code(script, basic_robot.call_limit[authlevel+1]); --  coroutines need ccounter reset or 'infinite loops' fail after limit
 	end
 	if err then return err end
 	
@@ -1104,7 +1106,7 @@ local spawn_robot = function(pos,node,ttl)
 		
 			if data.authlevel<3 then -- not admin
 				err = check_code(script);
-				script = preprocess_code(script);
+				script = preprocess_code(script, basic_robot.call_limit[data.authlevel+1]);
 			end
 			if err then 
 				meta:set_string("infotext","#CODE CHECK ERROR : " .. err);
diff --git a/scripts/utils/helper_chat_bot.lua b/scripts/utils/helper_chat_bot.lua
index 85d4225..e2a0704 100644
--- a/scripts/utils/helper_chat_bot.lua
+++ b/scripts/utils/helper_chat_bot.lua
@@ -1,7 +1,10 @@
 if not init then 
 	init = true; self.listen(1);
 	self.spam(1); self.label("help bot")
+	
+	talk = function(msg) minetest.chat_send_all("<help bot> " .. msg) end
 	keywords = {
+		{"tp", 14},
 		{"help",
 			{"robot",6},{"",1}
 		},
@@ -22,6 +25,8 @@ if not init then
 		{"rnd",{"",11}},
 		{"bye",{"",12}},
 		{"!!",{"",9}},
+		
+		{"calc", 13},
 	}
 	answers = {
 		"%s open inventory, click 'Quests' and do them to get more stuff", --1
@@ -36,20 +41,31 @@ if not init then
 		"to get dirt craft composter and use it with leaves", -- 10
 		"rnd is afk. in the meantime i can answer your questions",
 		"bye %s",
+		function(speaker,msg)  -- 13, calc
+			local expr = string.sub(msg,5); if string.find(expr,"%a") then return end
+			local res = _G.loadstring("return " .. expr)();	say(expr .. " = " .. res)
+		end,
+		function(speaker,msg) -- 14,tp
+			local p1 = minetest.get_player_by_name(speaker);
+			local p2 = minetest.get_player_by_name(string.sub(msg,4));
+			if p1 and p2 then
+				p1:setpos(p2:getpos())
+			end
+		end,
 	}
 end
 
 speaker,msg = self.listen_msg();
 if msg then
-	msg = string.lower(msg);
+	--msg = string.lower(msg);
 	sel = 0;
 	for i = 1, #keywords do
 		local k = string.find(msg,keywords[i][1])
 		if k then 
-			if type(keywords[i][2])~="table" then
+			if type(keywords[i][2])~="table" then -- one topic only
 				if k == 1 then sel = keywords[i][2] break end
 			else
-				for j=2,#keywords[i] do
+				for j=2,#keywords[i] do -- category of several topics
 					if string.find(msg,keywords[i][j][1]) then 
 						sel =  keywords[i][j][2]; break;
 					end
@@ -61,10 +77,12 @@ if msg then
 	
 	if sel>0 then
 		local response = answers[sel];
-		if string.find(response,"%%s") then
-			say(string.format(response,speaker))
+		if type(response) == "function" then
+			response(speaker,msg)		
+		elseif string.find(response,"%%s") then
+			talk(string.format(response,speaker))
 		else
-			say(response)
+			talk(response)
 		end
 	end