Printed show_level first text

ROADMAP

@@ -226,6 +226,7 @@ It's really fast. May be used on a website, to show the actual map.
 - see https://github.com/chipgw/minetest-mumble-wrapper
 *** v0.0.2
 **** [feature_showLevel] Our own mod
+     CLOCK: [2018-12-30 dim. 19:23]
      CLOCK: [2018-12-30 dim. 18:06]--[2018-12-30 dim. 18:40] =>  0:34
      *xpro doesn't show total level ? Maybe write a show_level mod ?*
 - [X] First create our own mod/nint.lua with depends description etc...

TODO

@@ -11,4 +11,5 @@ minetest-solebull - LGPL-2.1 - A PVP/faction game for minetest based on Cobalt.
    
    
 * v0.0.1-4 (29 Dec. 2018 - ???) CLOC ???,???
+- Printed show_level first text
 - Trying an XP/level mod

mods/advanced_npc/init.lua

@@ -51,13 +51,5 @@ dofile(path .. "/executable/node_registry.lua")
 dofile(path .. "/occupations/occupations.lua")
 -- Load random data definitions
 dofile(path .. "/info/info.lua")
---dofile(path .. "/random_data.lua")
---dofile(path .. "/data/dialogues_data.lua")
---dofile(path .. "/data/gift_items_data.lua")
---dofile(path .. "/data/names_data.lua")
---dofile(path .. "/data/occupations/default.lua")
---dofile(path .. "/data/occupations/default_farmer.lua")
---dofile(path .. "/data/occupations/default_priest.lua")
---dofile(path .. "/data/occupations/default_miner.lua")
 
 print (S("[Mod] Advanced NPC loaded"))

mods/show_level/init.lua

@@ -1,18 +1,25 @@
 -- Permanently shows the player's level
 
-
+local elemid = nil -- Needed to update existing HUD element
 
 local update_level = function(playername)
-   minetest.log("error", "[show_level] Updating level for "..playername)
    local player = minetest.get_player_by_name(playername)
-   local elemid = player:hud_add({
-	 hud_elem_type = "text",
-	 position      = {x = 0.5, y = 0.5},
-	 offset        = {x = 0,   y = 0},
-	 text          = "Hello world!",
-	 alignment     = {x = 0, y = 0},  -- center aligned
-	 scale         = {x = 100, y = 100}, -- covered later
-   })
+
+   if elemid == nil then
+      -- Create HUD element
+      minetest.log("error", "[show_level] Creating level HUD for "..playername)
+      elemid = player:hud_add({
+	    hud_elem_type = "text",
+	    position      = {x = 0.5, y = 0.5},
+	    offset        = {x = 0,   y = 0},
+	    text          = "Hello world!",
+	    alignment     = {x = 0, y = 0},  -- center aligned
+	    scale         = {x = 100, y = 30}, -- covered later
+      })
+   else
+      -- Update
+      minetest.log("error", "[show_level] Updating level for "..playername)
+   end
 end
 
 -- Showing level when a player join