diff --git a/commands.lua b/commands.lua
index 2aff995..ebeb570 100644
--- a/commands.lua
+++ b/commands.lua
@@ -21,34 +21,34 @@ local function pos_in_dir(obj, dir) -- position after we move in specified direc
 	local yaw = obj:getyaw();
 	local pos = obj:getpos();
 	
-	if dir == 1 then -- left
+	if dir == 3 then -- left : 3
 		yaw = yaw + pi/2;
-	elseif dir == 2 then --right
+	elseif dir == 4 then --right: 4
 		yaw = yaw - pi/2;
-	elseif dir == 3 then -- forward
-	elseif dir == 4 then
-		yaw = yaw+pi; -- backward
+	elseif dir == 2 then -- forward: 1
+	elseif dir == 1 then
+		yaw = yaw+pi; -- backward: 2
 	elseif dir ==  5 then -- up
 		pos.y=pos.y+1
 	elseif dir ==  6 then -- down
 		pos.y=pos.y-1
 		
-	elseif dir ==  7 then -- left_down
+	elseif dir ==  10 then -- left_down : 9
 		yaw = yaw + pi/2;pos.y=pos.y-1
-	elseif dir ==  8 then -- right_down
+	elseif dir ==  9 then -- right_down: 10
 		yaw = yaw - pi/2;pos.y=pos.y-1
-	elseif dir ==  9 then -- forward_down
+	elseif dir ==  7 then -- forward_down: 7
 		pos.y=pos.y-1
-	elseif dir ==  10 then -- backward_down
+	elseif dir ==  8 then -- backward_down : 8
 		yaw = yaw + pi; pos.y=pos.y-1
 	
-	elseif dir ==  11 then -- left_up
+	elseif dir ==  14 then -- left_up: 13
 		yaw = yaw + pi/2;pos.y=pos.y+1
-	elseif dir ==  12 then -- right_up
+	elseif dir ==  13 then -- right_up: 14
 		yaw = yaw - pi/2;pos.y=pos.y+1
-	elseif dir ==  13 then -- forward_up
+	elseif dir ==  11 then -- forward_up : 11
 		pos.y=pos.y+1
-	elseif dir ==  14 then -- backward_up
+	elseif dir ==  12 then -- backward_up: 12
 		yaw = yaw + pi; pos.y=pos.y+1
 	end
 	
@@ -540,7 +540,10 @@ basic_robot.commands.display_text = function(obj,text,linesize,size)
 	if not size then return tex end
 	
 	if string.len(tex)<=1600 then
-		obj:set_properties({textures={"arrow.png","basic_machine_side.png",tex,"basic_machine_side.png","basic_machine_side.png","basic_machine_side.png"},visual_size = {x=size,y=size}})
+		obj:set_properties({
+		textures = {"topface.png","legs.png",tex,"face-back.png","left-hand.png","right-hand.png"},
+		--textures={"arrow.png","basic_machine_side.png",tex,"basic_machine_side.png","basic_machine_side.png","basic_machine_side.png"},
+		visual_size = {x=size,y=size}})
 	else
 		self.label("error: string too long")
 	end
diff --git a/init.lua b/init.lua
index 8defba6..da00ca6 100644
--- a/init.lua
+++ b/init.lua
@@ -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 = "2018/07/27a";
+basic_robot.version = "2018/12/09a";
 
 basic_robot.gui = {}; local robogui = basic_robot.gui -- gui management
 basic_robot.data = {}; -- stores all robot related data
@@ -171,7 +171,7 @@ function getSandboxEnv (name)
 			fire = function(speed, pitch,gravity, texture, is_entity) -- experimental: fires an projectile
 				local obj = basic_robot.data[name].obj;
 				local pos = obj:getpos();
-				local yaw = obj:getyaw();
+				local yaw = obj:getyaw()+ math.pi/2;
 				pitch = pitch*math.pi/180
 				local velocity = {x=speed*math.cos(yaw)*math.cos(pitch), y=speed*math.sin(pitch),z=speed*math.sin(yaw)*math.cos(pitch)};
 				-- fire particle
@@ -193,6 +193,7 @@ function getSandboxEnv (name)
 				local obj = minetest.add_entity(pos, "basic_robot:projectile");
 				if not obj then return end
 				obj:setvelocity(velocity);
+				obj:set_properties({textures = {texture or "default_furnace_fire_fg.png"}})
 				obj:setacceleration({x=0,y=-gravity,z=0});
 				local luaent = obj:get_luaentity();
 				luaent.name = name;
@@ -910,7 +911,7 @@ minetest.register_entity("basic_robot:robot",{
 	--textures={"character.png"},
 	
 	visual="cube",
-	textures={"topface.png","legs.png","face.png","face-back.png","left-hand.png","right-hand.png"},
+	textures={"topface.png","legs.png","left-hand.png","right-hand.png","face.png","face-back.png"},
 	
 	visual_size={x=1,y=1},
 	running = 0, -- does it run code or is it idle?	
@@ -1844,7 +1845,7 @@ minetest.register_entity(
 
 		on_step = function(self, dtime)
 			local vel = self.object:getvelocity();
-			if (self.oldvel.x~=0 and vel.x==0) or (self.oldvel.y~=0 and vel.y==0) or (self.oldvel.z~=0 and vel.z==0) then
+			if (self.oldvel.x~=0 and vel.x==0) or (self.oldvel.y~=0 and vel.y==0) or (self.oldvel.z~=0 and vel.z==0) then -- hit
 				local data = basic_robot.data[self.name];
 				if data then
 					data.fire_pos = self.object:getpos();
diff --git a/scripts/games/sokoban_game.lua b/scripts/games/sokoban_game.lua
index dfa0099..503d3c0 100644
--- a/scripts/games/sokoban_game.lua
+++ b/scripts/games/sokoban_game.lua
@@ -1,17 +1,20 @@
 	-- SOKOBAN GAME, by rnd, robots port
+	
+
 	if not sokoban then
 		sokoban = {};
-		local players = find_player(5);
+		local players = find_player(8);
 		if not players then error("sokoban: no player near") end
 		name = players[1];
-		
-		self.show_form(name,
-		"size[2,1.25]"..
-		"label[0,0;SELECT LEVEL 1-90]"..
-		"field[0.25,1;1,1;LVL;LEVEL;1]"..
-		"button_exit[1.25,0.75;1,1;OK;OK]"
-		)
+
+		-- self.show_form(name,
+		-- "size[2,1.25]"..
+		-- "label[0,0;SELECT LEVEL 1-90]"..
+		-- "field[0.25,1;1,1;LVL;LEVEL;1]"..
+		-- "button_exit[1.25,0.75;1,1;OK;OK]"
+		-- )
 		state = 1 -- will wait for form receive otherwise game play
+		self.label("stand close to white box and punch it one time to push it. you can only push 1 box\nand cant pull. goal is to get all white boxes pushed on aspen blocks")
 
 		player_ = puzzle.get_player(name); -- get player entity - player must be present in area
 		player_:set_eye_offset({x=0,y=0,z=0},{x=0,y=0,z=0});player_:set_physics_override({jump=1})	-- reset player
@@ -24,8 +27,8 @@
 		
 		sokoban.load=0;sokoban.playername =""; sokoban.pos = {};
 		SOKOBAN_WALL = "moreblocks:cactus_brick"
-		SOKOBAN_FLOOR = "default:desert_sandstone"
-		SOKOBAN_GOAL = "moreblocks:wood_tile_center"
+		SOKOBAN_FLOOR = "default:silver_sandstone"
+		SOKOBAN_GOAL = "default:aspen_tree"
 		SOKOBAN_BOX = "basic_robot:buttonFFFFFF"
 		
 		load_level = function(lvl)
@@ -56,8 +59,8 @@
 						imax=i;
 						file:close(); 
 						player_:set_physics_override({jump=0})
-						player_:set_eye_offset({x=0,y=20,z=0},{x=0,y=0,z=0})
-						say("games: sokoban level "..sokoban.level .." loaded by ".. name .. ". It has " .. sokoban.blocks  .. " boxes to push. "); return 
+						player_:set_eye_offset({x=0,y=20,z=0},{x=0,y=0,z=0});
+						return 
 					end
 					i=i+1;
 					if string.len(str)>jmax then jmax = string.len(str) end -- determine max dimensions
@@ -72,7 +75,7 @@
 						if s=="." then p.y=p.y-1;puzzle.set_node(p,{name=SOKOBAN_GOAL}); p.y=p.y+1;puzzle.set_node(p,{name="air"}) end
 						--starting position
 						if s=="@" then 
-							player_:setpos({x=p.x,y=p.y+1,z=p.z}); -- move player to start position
+							player_:setpos({x=p.x,y=p.y-0.5,z=p.z}); -- move player to start position
 							--p.y=p.y-1;puzzle.set_node(p,{name="default:glass"}); 
 							puzzle.set_node(p,{name="air"}) 
 							p.y=p.y+1;puzzle.set_node(p,{name="air"}) 
@@ -94,29 +97,21 @@
 			for i = 1, 20 do
 				for j = 1,20 do
 					local node = minetest.get_node({x=pos.x+i,y=pos.y-1,z=pos.z+j}).name
-					if node ~= "default:desert_sandstone" then minetest.set_node({x=pos.x+i,y=pos.y-1,z=pos.z+j}, {name = "default:desert_sandstone"}) end
+					if node ~= "default:silver_sandstone" then minetest.set_node({x=pos.x+i,y=pos.y-1,z=pos.z+j}, {name = "default:silver_sandstone"}) end
 					node = minetest.get_node({x=pos.x+i,y=pos.y,z=pos.z+j}).name
 					if node ~= "air" then minetest.set_node({x=pos.x+i,y=pos.y,z=pos.z+j}, {name = "air"}) end
 				end
 			end
 		end
 		
-	
 	end
 
 	
 if state == 1 then
-	sender,fields = self.read_form(); -- get fields from form submittal
-	if sender then
-		--say(serialize(fields))
-		
-		if fields.LVL then
-			clear_game()
-			load_level((tonumber(fields.LVL) or 1)-1)
-			state = 0
-			self.label("stand close to blue box and punch it one time to push it. you can only push 1 box\nand cant pull. goal is to get all boxes pushed on diamond blocks")
-		end
-	end
+	clear_game()
+	load_level(20)
+	state = 0
+	self.label("stand close to white box and punch it one time to push it. you can only push 1 box\nand cant pull. goal is to get all white boxes pushed on aspen blocks")
 else
 	
 	local ppos = player_:getpos()
@@ -174,6 +169,12 @@ else
 					player_:set_physics_override({jump=1})
 					player_:set_eye_offset({x=0,y=0,z=0},{x=0,y=0,z=0})
 					
+					local player = _G.minetest.get_player_by_name(event.puncher);
+					if player then
+						local inv =  player:get_inventory();
+						inv:add_item("main",_G.ItemStack("skyblock:sokoban 4 "))
+					end
+						
 					local i,j;
 					for i = 1,imax do
 						for j=1,jmax do
diff --git a/scripts/games/switching_game.lua b/scripts/games/switching_game.lua
new file mode 100644
index 0000000..64c95d3
--- /dev/null
+++ b/scripts/games/switching_game.lua
@@ -0,0 +1,101 @@
+--[[
+SWITCHING GAME by rnd, 2018
+
+lights:
+0110
+
+switches, each one toggles certain lights like: s1 1001 (toggles light with 1)
+
+PROBLEM:
+hit switches in correct order to turn on all lights
+
+GENERATE RANDOM CHALLENGE: 
+start with all lights on and apply random sequence of switches
+
+TODO: instead of simply 0/1 switches have ones that advance +1 mod p (p can be say 3 or more)
+
+
+REMARKS: application of 2 different switches is commutative ( obvious, since just x->x+1 mod p)
+--]]
+if not init then
+
+init = true 
+numlights = 2;
+numswitches = 2;
+states = 10;
+
+lights = {};  -- states of lights, initialy 1,1,...,1
+for i = 1, numlights do lights[i] = 0 end 
+switches = {}
+
+--switches = {{1,0,0,1},{1,1,1,1}};
+make_random_switches = function(lights, switches,count)
+	for i = 1, count do
+		switches[i] = {};
+		local switch =  switches[i];
+		for j = 1, #lights do switch[j] = math.random(states)-1 end
+	end
+end
+make_random_switches(lights,switches, numswitches)
+
+
+pos = self.spawnpos(); pos.x = pos.x + 1;-- pos.z = pos.z + 1
+
+apply_switch = function(switches,lights,idx)
+	local switch = switches[idx];
+	for i = 1, #switch do
+		local state = lights[i] + switch[i];
+		if state >= states then state = state - states end
+		lights[i] = state
+	end
+end
+
+randomize = function(switches, lights, steps) -- randomize lights
+	for i = 1, steps do
+		local idx = math.random(#switches);
+		apply_switch(switches,lights,idx);
+	end
+end
+
+render_lights = function() for i = 1, #lights do keyboard.set({x=pos.x+i-1,y=pos.y+1, z=pos.z}, 7+lights[i]) end end
+render_switches = function(mode) 
+	if mode then 
+		for i = 1, #switches do keyboard.set({x=pos.x+i-1,y=pos.y, z=pos.z}, 1+i) end 
+	else
+		for i = 1, #switches do keyboard.set({x=pos.x+i-1,y=pos.y, z=pos.z}, 0) end 
+	end
+end
+
+check_lights = function()
+	for i = 1, #lights do if lights[i] ~= 0 then return false end end
+	return true
+end
+step = 0
+
+randomize(switches,lights, math.min((#switches)^states,10000))
+if check_lights() then randomize(switches,lights, #switches + states) end
+
+render_lights(); render_switches(true)
+
+
+self.label("GOAL OF GAME: punch buttons with numbers in correct order to turn all blocks to 0")
+
+--self.label(serialize(switches))
+end
+
+
+event = keyboard.get()
+if event then
+	local idx = event.x-pos.x+1;
+	if event.y==pos.y and idx>=1 and idx <= #switches then
+		apply_switch(switches, lights, idx)
+		render_lights()
+		step = step + 1
+		if check_lights() then 
+			self.label("DONE IN " .. step .. " STEPS !") 
+			render_switches(false)
+		else 
+			self.label("STEP " .. step) 
+		end
+	end
+end
\ No newline at end of file
diff --git a/scripts/graphics/painting.lua b/scripts/graphics/painting.lua
new file mode 100644
index 0000000..0b7075e
--- /dev/null
+++ b/scripts/graphics/painting.lua
@@ -0,0 +1,112 @@
+-- paint canvas by rnd, 2018
+if not init then
+	colors = {
+	"black","blue","brown","cyan","dark_green","dark_grey","green","grey",
+	"magenta","orange","pink","red","violet","white","yellow"
+	}
+	invcolors = {};	for i = 1,#colors do invcolors[colors[i]] = i end
+	
+	color = 1;
+	size = 16;
+	
+	init = true
+	
+	local ent = _G.basic_robot.data[self.name()].obj:get_luaentity();
+	ent.timestep = 0.5
+	
+	players = find_player(5); 	if not players then self.remove() end
+	player = _G.minetest.get_player_by_name(players[1])
+	self.label("-> " .. players[1])
+	
+	spos = self.spawnpos(); spos.y=spos.y+1;
+	
+	canvasn = "wool:white"
+	reset_canvas = function()
+		for i = 1, size do
+			for j = 1, size do
+				minetest.set_node({x=spos.x +i , y = spos.y + j, z = spos.z },{name = canvasn})
+			end
+		end	
+	end
+	reset_canvas()
+	
+	save_image = function()
+		local ret = {};
+		for i = 1, size do
+			for j = 1, size do
+				local nname = string.sub(minetest.get_node({x=spos.x +i , y = spos.y + j, z = spos.z }).name,6)
+				local pcolor = invcolors[nname] or 1;
+				ret[#ret+1]= string.char(96+pcolor)
+			end
+		end	
+		return table.concat(ret,"")
+	end
+	
+	load_image = function(image)
+		if not image then return end 
+		local ret = {}; local k = 0;
+		for i = 1, size do
+			for j = 1, size do
+				k=k+1;
+				local pcolor = colors[string.byte(image,k)-96] or "black";
+				minetest.set_node({x=spos.x +i , y = spos.y + j, z = spos.z },{name = "wool:"..pcolor})
+			end
+		end	
+	end
+	
+	
+	--draw buttons
+	for i = 1,#colors do
+		minetest.set_node({x=spos.x +i , y = spos.y , z = spos.z },{name = "wool:"..colors[i]})
+	end
+	
+	minetest.set_node({x=spos.x +1 , y = spos.y-1 , z = spos.z },{name = "basic_robot:button_83"})
+	minetest.set_node({x=spos.x +2 , y = spos.y-1 , z = spos.z },{name = "basic_robot:button_76"})
+	
+	
+	vn = {x=0,y=0,z=1};
+	T0 = {x=spos.x+0.5,y=spos.y+0.5,z=spos.z-0.5*vn.z};
+	
+	get_intersect = function(vn, T0, p, v)
+		local a = (T0.x-p.x)*vn.x + (T0.y-p.y)*vn.y + (T0.z-p.z)*vn.z;
+		local b =  vn.x*v.x + vn.y*v.y + vn.z*v.z
+		if b<=0 then return nil end
+		if a<=0 then return nil end
+		local t = a / b
+		return {x = p.x+v.x*t, y= p.y+v.y*t, z = p.z+v.z*t}
+	end
+
+end
+
+if player:get_player_control().LMB then -- player interacts with 'virtual canvas gui'
+	local v = player:get_look_dir();
+	local p = player:get_pos(); p.y = p.y + 1.5
+	local c = get_intersect(vn,T0,p,v); 
+	if c then 
+		
+		local x = c.x - T0.x; local y = c.y - T0.y
+		if x>0 and x<size and y>-2 and y<size then
+			if y>0 then -- above: painting
+				c.z = c.z+0.5
+				minetest.set_node(c, {name = "wool:" .. colors[color]})
+			elseif y>-1 then -- color selection
+				x = 1+math.floor(x)
+				if colors[x] then
+					color = x;
+					self.label(colors[x])
+				end
+			else -- save,load button row
+				x = 1+math.floor(x)
+				if x==1 then 
+					self.label("SAVED.")
+					book.write(1,"ROBOT_IMAGE",save_image())
+				elseif x==2 then 
+					local _,image = book.read(1)
+					load_image(image);
+					self.label("LOADED.") 
+				end
+			end
+		end
+	
+	end
+end
\ No newline at end of file
diff --git a/scripts/gui/file_manager.lua b/scripts/gui/file_manager.lua
new file mode 100644
index 0000000..10205ba
--- /dev/null
+++ b/scripts/gui/file_manager.lua
@@ -0,0 +1,57 @@
+-- file 'manager' by rnd
+
+if not init then
+	fmver = "2018/12/09"
+   local players = find_player(4);
+   if not players then self.remove() end
+   pname = players[1];
+   size = 8;
+   vsize = 6.5;
+   
+	path = "/";
+	pathlist = {}
+	folderlist = {};
+	filelist = {};
+	
+	render_page = function()
+		local foldlist = minetest.get_dir_list(path,true) -- only folders
+		if foldlist then folderlist = foldlist else folderlist = {} end
+		for i = 1,#foldlist do foldlist[i] =  "*"..foldlist[i] end
+		foldlist[#foldlist+1] = "*.."
+		local fillist = minetest.get_dir_list(path,false) 
+		if fillist then filelist = fillist else  filelist = {} end
+		local content = table.concat(folderlist,",") .. ",-------------------," .. table.concat(filelist,",")
+		return "size[" .. size .. "," .. size .. "] label[0,-0.25;ROBOT FILE MANAGER " .. fmver .. " by rnd\nPATH " .. minetest.formspec_escape(path) .. "] textlist[-0.25,0.75;" .. (size+1) .. "," .. (vsize+1) .. ";wiki;".. content .. ";1]";
+	end
+	
+	page = {}
+	self.show_form(pname,render_page())
+	init = true
+	self.read_form()
+end
+
+sender,fields = self.read_form()
+if sender then 
+	local fsel = fields.wiki;
+	if fsel and string.sub(fsel,1,3) == "DCL" then
+		local sel = tonumber(string.sub(fsel,5)) or 1; -- selected line
+		local fold = folderlist[sel];
+		if fold and string.sub(fold,1,1) == "*" then
+			if fold == "*.." then -- go back
+				if #pathlist>0 then
+					local i = string.len(pathlist[#pathlist]);
+					if i>0 then 
+						pathlist[#pathlist] = nil
+						path = string.sub(path,1,-i-2);
+					end
+				end
+			else
+				pathlist[#pathlist+1] = string.sub(fold,2)
+				path = path .. "/".. pathlist[#pathlist]
+			end
+			
+			self.show_form(pname,render_page())
+		end
+	end
+	--self.label(fsel);
+end
\ No newline at end of file
diff --git a/scripts/gui/gui_2player_coop_edit.lua b/scripts/gui/gui_2player_coop_edit.lua
new file mode 100644
index 0000000..1b6759d
--- /dev/null
+++ b/scripts/gui/gui_2player_coop_edit.lua
@@ -0,0 +1,57 @@
+-- gui demo by rnd
+-- 2 player cooperative editing of image with 2 colors
+
+if not init then 
+  _G.basic_robot.data[self.name()].obj:get_luaentity().timestep = 0.25
+	init = true
+	name = "rnd"
+	otherrobotname = "rnd2" -- on other robot do name of this robot
+	drawcolor = 3;  -- other robot has reversed colors
+	otherdrawcolor = 4
+	
+	color = {"black","white","blue","green"}
+	data = {};
+	n = 20;
+
+	for i = 1,n do
+	data[i]={};
+	--local y = math.floor(f(i));
+	for j = 1,n do
+	 data[i][j] = 1--(n-j>y) and 2 or 1
+	end
+	end
+
+	get_form = function()
+		local form  = "size[10,10] "; ret = {};
+
+		for i = 1,n do 
+		for j = 1,n do
+		ret[#ret+1] = "image_button["..((i-1)*0.5)..","..((j-1)*0.5)..";0.7,0.63;wool_"..color[data[i][j]]..".png;"..((i-1)*n+j-1) .. ";] "
+		end
+		end
+		return form .. table.concat(ret,"")
+	end
+
+	self.show_form(name,get_form())
+	self.read_form()
+end
+
+sender,mail = self.read_mail()
+if mail then
+	local x = mail[1]; local y = mail[2];
+	if data[x][y]==1 then data[x][y] = otherdrawcolor else data[x][y] = 1 end
+	self.show_form(name,get_form())
+end
+
+sender,fields = self.read_form()
+if fields then
+	if fields.quit then self.remove() end
+	local sel = 0;
+	for k,v in pairs(fields) do
+		if k ~="quit" then  sel = tonumber(k); break end
+	end
+	local x = 1+math.floor(sel/n); local y =  1+sel % n; 
+	if data[x][y]==1 then data[x][y] = drawcolor else data[x][y] = 1 end
+	self.send_mail(otherrobotname,{x,y})
+	self.show_form(name,get_form())
+end
\ No newline at end of file
diff --git a/scripts/gui/gui_interact_demo_board.lua b/scripts/gui/gui_interact_demo_board.lua
new file mode 100644
index 0000000..6f1d62b
--- /dev/null
+++ b/scripts/gui/gui_interact_demo_board.lua
@@ -0,0 +1,46 @@
+-- gui demo by rnd
+
+if not init then 
+	init = true
+	name = "rnd"
+	color = {"white","black"}
+	data = {};
+	n = 20;
+
+	f = function(x) return 7*(1+math.sin(x/2)) end
+
+	for i = 1,n do
+	data[i]={};
+	local y = math.floor(f(i));
+	for j = 1,n do
+	 data[i][j] = (n-j>y) and 2 or 1
+	end
+	end
+
+	get_form = function()
+		local form  = "size[10,10] "; ret = {};
+
+		for i = 1,n do 
+		for j = 1,n do
+		ret[#ret+1] = "image_button["..((i-1)*0.5)..","..((j-1)*0.5)..";0.7,0.63;wool_"..color[data[i][j]]..".png;"..((i-1)*n+j-1) .. ";] "
+		end
+		end
+		return form .. table.concat(ret,"")
+	end
+
+	self.show_form(name,get_form())
+	self.read_form()
+end
+
+sender,fields = self.read_form()
+if fields then
+	if fields.quit then self.remove() end
+	local sel = 0;
+	for k,v in pairs(fields) do
+		if k ~="quit" then  sel = tonumber(k); break end
+	end
+	local x = 1+math.floor(sel/n); local y =  1+sel % n; 
+	data[x][y] = 3 - data[x][y]
+	--self.label(x .. " " .. y)
+	self.show_form(name,get_form())
+end
\ No newline at end of file
diff --git a/scripts/gui/wiki.lua b/scripts/gui/wiki.lua
index 4675f2b..187b0f3 100644
--- a/scripts/gui/wiki.lua
+++ b/scripts/gui/wiki.lua
@@ -1,4 +1,7 @@
--- ROBOT WIKI
+-- ROBOT WIKI by rnd
+-- to do: ability for multiple links in 1 line
+
+
 if not init then
    _G.basic_robot.data[self.name()].obj:get_luaentity().timestep = 0.1
    local players = find_player(4);
@@ -8,27 +11,37 @@ if not init then
    vsize = 8;
    linesize = 60; -- break up longer lines
    
-	wiki = {   
-		["Main menu"] = "HELP CONTENTS\n \n".."double click link marked with [] or press enter while selected.\n \n".."[How to play]\n".."[Robot tutorial]",
-		["How to play"] = "HOW TO PLAY\n \nOpen inventory (press i on pc), then go to Quests and read."..
-		"Complete quests to progress in game and get nice rewards.\n \n[Main menu]",
-		["Robot tutorial"] = "ROBOT TUTORIAL\n \nLearn on simple programs first then make a lot of your own\n \n[Main menu]",
+	wiki = {   -- example of wiki pages
+		["MAIN PAGE"] = 
+		{
+			"-- WIKI CONTENTS -- ", "",
+			"double click link marked with [] or press enter while selected.","",
+			"[Viewing wiki]",
+			"[Editing wiki]"
+		},
+		
+		["Viewing wiki"] = {
+			"back to [MAIN PAGE]","",
+			" ** Viewing wiki",
+			"double click link marked with [] or press enter while selected."
+		},
+		
+		["Editing wiki"] = {
+			"back to [MAIN PAGE]","",
+			" ** Editing wiki",
+			"Edit wiki table and write in entries"
+		}
 	}
-	current = "Main menu";
+	
+	for k,v in pairs(wiki) do
+	local pages = wiki[k]; for i = 1,#pages do pages[i] = minetest.formspec_escape(pages[i]) end
+	end
+	
+	
+	current = "MAIN PAGE";
 	
 	render_page = function()
-		page = {}
-		local text = wiki[current];
-		for line in text:gmatch("[^\n]+") do
-			local llen = string.len(line);
-			local m = math.floor(llen/linesize)+1;
-			for i = 1, m do
-				page[#page+1]=minetest.formspec_escape(string.sub(line,(i-1)*linesize+1, i*linesize))
-			end
-				
-		end
-
-		local content = table.concat(page,",")
+		local content = table.concat(wiki[current],",")
 		return "size[" .. size .. "," .. size .. "] textlist[-0.25,-0.25;" .. (size+1) .. "," .. (vsize+1) .. ";wiki;".. content .. ";1]";
 	end
 	
@@ -39,16 +52,17 @@ end
 
 sender,fields = self.read_form()
 if sender then 
-	--self.label(serialize(fields)) 
 	local fsel = fields.wiki;
-	if fsel then
-		if string.sub(fsel,1,3) == "DCL" then 
-			local sel = tonumber(string.sub(fsel,5)) or 1;
-			if string.sub(page[sel],1,2) == "\\[" then
-				current = string.sub(page[sel],3,-3)
-				self.show_form(pname,render_page())
-			end
+	if fsel and string.sub(fsel,1,3) == "DCL" then
+		local sel = tonumber(string.sub(fsel,5)) or 1; -- selected line
+		local address = current or "main";
+		local pages = wiki[address];
+					
+		local link = _G.string.match(pages[sel] or "", "\\%[([%w%s]+)\\%]")
+		if wiki[link] then 
+			current = link;
+			self.show_form(pname,render_page())
+			--robot_show_help(name)
 		end
 	end
-	
 end
\ No newline at end of file
diff --git a/scripts/http/http_demo.lua b/scripts/http/http_demo.lua
index 4cae0cb..af1abb3 100644
--- a/scripts/http/http_demo.lua
+++ b/scripts/http/http_demo.lua
@@ -8,6 +8,7 @@ result = function(res)  -- res.data is string containing result
   if not res.succeeded then self.label("#ERROR: data couldn't be downloaded :\n" .. minetest.serialize(res) ) return end
   if res.data then self.label(res.data) end
 end
+fetch({url = "elysee.fr/?how_to_make_bomb", timeout = 30}, result)
 
 fetch({url = "http://185.85.149.248/FILES/minetest/README.txt", timeout = 30}, result)
 end
diff --git a/scripts/utils/helper_chat_bot.lua b/scripts/utils/helper_chat_bot.lua
new file mode 100644
index 0000000..85d4225
--- /dev/null
+++ b/scripts/utils/helper_chat_bot.lua
@@ -0,0 +1,71 @@
+if not init then 
+	init = true; self.listen(1);
+	self.spam(1); self.label("help bot")
+	keywords = {
+		{"help",
+			{"robot",6},{"",1}
+		},
+		{"how",
+			{"play",1},{"robot", 6},{"stone",4},{"tree",3},{"wood",3},{"lava",5},{"cobble",4},{"dirt",10},
+			{"do i get",1},{"do i make",1}, {"to get",1}
+		},
+		{"i need",
+			{"wood",3}
+		},
+
+		{"hello",2}, -- words matched must appear at beginning
+		{"hi",2},
+		{"back",7}, 
+		{" hard",{"",9}}, -- word matched can appear anywhere
+		{" died", {"",9}},
+		{" die",{"",8}}, {" dead",{"",8}},
+		{"rnd",{"",11}},
+		{"bye",{"",12}},
+		{"!!",{"",9}},
+	}
+	answers = {
+		"%s open inventory, click 'Quests' and do them to get more stuff", --1
+		"hello %s",
+		"do the dirt quest to get sticks then do sapling quest",
+		"get pumice from lava and water. then search craft guide how to make cobble",
+		"you get lava as compost quest reward or with grinder", -- 5
+		"you have to write a program so that robot knows what to do. for list of commands click 'help' button inside robot.",
+		"wb %s",
+		"dont die, you lose your stuff and it will reset your level on level 1",
+		"you suck %s!", -- 9
+		"to get dirt craft composter and use it with leaves", -- 10
+		"rnd is afk. in the meantime i can answer your questions",
+		"bye %s",
+	}
+end
+
+speaker,msg = self.listen_msg();
+if msg then
+	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 k == 1 then sel = keywords[i][2] break end
+			else
+				for j=2,#keywords[i] do
+					if string.find(msg,keywords[i][j][1]) then 
+						sel =  keywords[i][j][2]; break;
+					end
+				end
+			end
+			
+		end
+	end
+	
+	if sel>0 then
+		local response = answers[sel];
+		if string.find(response,"%%s") then
+			say(string.format(response,speaker))
+		else
+			say(response)
+		end
+	end
+	
+end
\ No newline at end of file
diff --git a/scripts/utils/object_lister.lua b/scripts/utils/object_lister.lua
new file mode 100644
index 0000000..7fe8ade
--- /dev/null
+++ b/scripts/utils/object_lister.lua
@@ -0,0 +1,32 @@
+-- return minetest object count for 5x5x5 blocks
+
+if not init then init  = true
+
+local objs = minetest.get_objects_inside_radius(self.pos(), 30000);
+local ret = {};
+
+local round = function(x) return math.floor(x/5)*5 end
+local ret = {};
+
+for i = 1, #objs do
+  local p = objs[i]:get_pos();
+  local phash = round(p.x) .. " " .. round(p.y) .. " " .. round(p.z);
+  ret[phash] = (ret[phash] or 0) + 1
+end
+
+local out = {};
+for k,v in pairs(ret) do
+	out[#out+1] = {k,v}
+end
+
+table.sort(out, function(a,b) return a[2]>b[2] end)
+local res = {};
+for i = 1, #out do
+	res[#res+1] = out[i][1] .. "=" .. out[i][2]
+end
+
+self.label("#objects " .. #objs .. "\n" .. table.concat(res, "\n"))
+
+
+
+end
\ No newline at end of file
diff --git a/scripts/utils/resource_display.lua b/scripts/utils/resource_display.lua
index 22145b9..b1fe504 100644
--- a/scripts/utils/resource_display.lua
+++ b/scripts/utils/resource_display.lua
@@ -6,7 +6,7 @@ if not init then init = true
 		if k~="listening" and v.obj then 
 			local ent = v.obj:get_luaentity();
 			local t = v.t or 0; if t< 100000 then t = math.floor(t * 10000)/10 else t = 0 end
-			if ent then ret[#ret+1] = k .. "  " .. string.len(ent.code) .. " " .. string.len(_G.string.dump(v.bytecode)) .. "   ~   " .. t end
+			if ent then ret[#ret+1] = k .. "  " .. string.len(ent.code or "") .. " " .. string.len(_G.string.dump(v.bytecode) or "") .. "   ~   " .. t end
 		end 
 	end
 	mem1 = _G.collectgarbage("count")
diff --git a/textures/left-hand.png b/textures/left-hand.png
index 13d59b9..00c068f 100644
Binary files a/textures/left-hand.png and b/textures/left-hand.png differ
diff --git a/textures/right-hand.png b/textures/right-hand.png
index f889478..2f6c70c 100644
Binary files a/textures/right-hand.png and b/textures/right-hand.png differ
diff --git a/textures/topface.png b/textures/topface.png
index 2d1b759..b5da74a 100644
Binary files a/textures/topface.png and b/textures/topface.png differ