some changes in *.cs files

Greta/Assets/PAC Engine/Scripts/AnimalsInInventory.cs

@@ -13,6 +13,7 @@ public class AnimalsInInventory : MonoBehaviour
     public GameObject Parent;
     // here is the script attached to
     public GameObject currentObject;
+    public int entityIDtoActivate;
     
 
     // Start is called before the first frame update

Greta/Assets/PAC Engine/Scripts/CanBePickedUP.cs

@@ -4,6 +4,7 @@ using UnityEngine;
 
 public class CanBePickedUP : MonoBehaviour
 {
+    static public CanBePickedUP core;
     public GameObject Item;
     public int entityID;
     public int stageID;                         

Greta/Assets/PAC Engine/Scripts/ChangeScenery.cs

@@ -4,6 +4,7 @@ using UnityEngine;
 
 public class ChangeScenery : MonoBehaviour
 {
+    static public ChangeScenery core;
     public GameObject oldSprite;
     public GameObject neueSprite;
     public int entityID;
@@ -26,6 +27,7 @@ public class ChangeScenery : MonoBehaviour
          */
         if (Database.core.entities[SupportFunctions.core.findEntityIndexById(entityID)].entityStageId == stage)
         {
+            //it has to be this way because we can not access the unique components via code in another way. 
             oldSprite.GetComponent<SpriteRenderer>().enabled = false;
             neueSprite.GetComponent<SpriteRenderer>().enabled = true;
             

Greta/Assets/PAC Engine/Scripts/CheckIfAllowed.cs

@@ -4,6 +4,7 @@ using UnityEngine;
 
 public class CheckIfAllowed : MonoBehaviour
 {
+    static public CheckIfAllowed core;
     public int QuestID;
     public GameObject Entity;
     public int nodesIndex;

Greta/Assets/PAC Engine/Scripts/DestroyOnStage.cs

@@ -19,6 +19,7 @@ public class DestroyOnStage : MonoBehaviour
     public int entityID;
     public int stageID;
     public GameObject ToDestroy;
+    public int ItemID;
     public bool shallReactivate;
  
     void Start()
@@ -43,7 +44,7 @@ public class DestroyOnStage : MonoBehaviour
             {
                 /*this is a specific case and I need to change it to a more universal approach
                  */
-                if (Database.core.items[SupportFunctions.core.findItemIndexById(29)].acquired)
+                if (Database.core.items[SupportFunctions.core.findItemIndexById(ItemID)].acquired)
                 {
                     ToDestroy.SetActive(true);
                     Database.core.entities[SupportFunctions.core.findEntityIndexById(entityID)].entityStageId++;