Got scripts to work as intended, had to use an ugly hack for it.

data/levels/Level1.xml

@@ -1337,6 +1337,21 @@
         <toChangeIdBlue>133</toChangeIdBlue>
         <toChangeObjNum>0</toChangeObjNum>
     </trigger>
+    <trigger>
+        <name>openFirstDoorUndo</name>
+        <xPosition>159.5</xPosition>
+        <yPosition>22</yPosition>
+        <zPosition>17.5</zPosition>
+        <targetIdGreen>-</targetIdGreen>
+        <targetIdBlue>-</targetIdBlue>
+        <distance>0.2</distance>
+        <isBiggerThan>false</isBiggerThan>
+        <objectNum>0</objectNum>
+        <luaScript>openFirstDoorUndo</luaScript>
+        <toChangeIdGreen>1</toChangeIdGreen>
+        <toChangeIdBlue>133</toChangeIdBlue>
+        <toChangeObjNum>0</toChangeObjNum>
+    </trigger>
 </composition>
 
 <composition>

data/levels/scripts/Template.lua

@@ -1,8 +1,11 @@
-if(triggeredSCRIPTNAME == nil) then
-    triggeredSCRIPTNAME = false
+--I have no idea why this hack from the internet works, but it does...
+package.path = debug.getinfo(1,"S").source:match[[^@?(.*[\/])[^\/]-$]] .."?.lua;".. package.path
+local global = require( "global" )
+if(global.triggeredSCRIPTNAME == nil) then
+    global.triggeredSCRIPTNAME = false
 end
 function trigger(objectToChange)
-    if(triggeredSCRIPTNAME == false) then
+    if(global.triggeredSCRIPTNAME == false) then
         if(not level) then
             print("No level found in Lua!")
             return
@@ -10,7 +13,7 @@ function trigger(objectToChange)
         
         --enter the scripts code here and replace all occurences of SCRIPTNAME with the name of the script.
         
-        triggeredSCRIPTNAME = true
+        global.triggeredSCRIPTNAME = true
         print("SCRIPTNAME")
     end
 end

data/levels/scripts/global.lua

@@ -0,0 +1,3 @@
+--global variable space
+local M = {}
+return M

data/levels/scripts/openFirstDoor.lua

@@ -1,8 +1,11 @@
-if(triggereOpenFirstDoor == nil) then
-    triggereOpenFirstDoor = false
+--I have no idea why this hack from the internet works, but it does...
+package.path = debug.getinfo(1,"S").source:match[[^@?(.*[\/])[^\/]-$]] .."?.lua;".. package.path
+local global = require( "global" )
+if(global.triggeredOpenFirstDoor == nil) then
+    global.triggeredOpenFirstDoor = false
 end
 function trigger(objectToChange)
-    if(triggereOpenFirstDoor == false) then
+    if(global.triggeredOpenFirstDoor == false) then
         if(not level) then
             print("No level found in Lua!")
             return
@@ -14,9 +17,9 @@ function trigger(objectToChange)
         local zPos = 17.5
         level:moveObject(objectToChange, strength, xPos, yPos, zPos)
         
-        triggeredOpenFirstDoorUndo = false
+        global.triggeredOpenFirstDoorUndo = false
         
-        triggereOpenFirstDoor = true
+        global.triggeredOpenFirstDoor = true
         print("openFirstDoor")
     end
 end

data/levels/scripts/openFirstDoorUndo.lua

@@ -1,8 +1,11 @@
-if(triggereOpenFirstDoorUndo == nil) then
-    triggereOpenFirstDoorUndo = false
+--I have no idea why this hack from the internet works, but it does...
+package.path = debug.getinfo(1,"S").source:match[[^@?(.*[\/])[^\/]-$]] .."?.lua;".. package.path
+local global = require( "global" )
+if(global.triggeredOpenFirstDoorUndo == nil) then
+    global.triggeredOpenFirstDoorUndo = true
 end
 function trigger(objectToChange)
-    if(triggereOpenFirstDoorUndo == false) then
+    if(global.triggeredOpenFirstDoorUndo == false) then
         if(not level) then
             print("No level found in Lua!")
             return
@@ -14,9 +17,9 @@ function trigger(objectToChange)
         local zPos = 17.5
         level:moveObject(objectToChange, strength, xPos, yPos, zPos)
         
-        triggeredOpenFirstDoor = false
+        global.triggeredOpenFirstDoor = false
         
-        triggereOpenFirstDoorUndo = true
+        global.triggeredOpenFirstDoorUndo = true
         print("openFirstDoorUndo")
     end
 end