diff --git a/Assets/Prefabs/GameManager.prefab b/Assets/Prefabs/GameManager.prefab
index 4fdc707..c468f3f 100644
--- a/Assets/Prefabs/GameManager.prefab
+++ b/Assets/Prefabs/GameManager.prefab
@@ -11,7 +11,6 @@ GameObject:
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diff --git a/Assets/Scenes/GridScene.meta b/Assets/Scenes/GridScene.meta
new file mode 100644
index 0000000..7e86d0d
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diff --git a/Assets/Scenes/GridScene.unity b/Assets/Scenes/GridScene.unity
index 9a31356..cf8a6f2 100644
--- a/Assets/Scenes/GridScene.unity
+++ b/Assets/Scenes/GridScene.unity
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diff --git a/Assets/Scenes/GridScene/NavMesh-NavMesh.asset b/Assets/Scenes/GridScene/NavMesh-NavMesh.asset
new file mode 100644
index 0000000..0e521da
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diff --git a/Assets/Scenes/GridScene/NavMesh-NavMesh.asset.meta b/Assets/Scenes/GridScene/NavMesh-NavMesh.asset.meta
new file mode 100644
index 0000000..2e38676
--- /dev/null
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diff --git a/Assets/Scripts/Grid/GridBuildingSystem.cs b/Assets/Scripts/Grid/GridBuildingSystem.cs
index 1818672..0f133d4 100644
--- a/Assets/Scripts/Grid/GridBuildingSystem.cs
+++ b/Assets/Scripts/Grid/GridBuildingSystem.cs
@@ -2,6 +2,7 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
+// Written with https://www.youtube.com/watch?v=dulosHPl82A
 public class GridBuildingSystem : MonoBehaviour
 {
     [SerializeField] PlacedObjectTypeSO placedObjectTypeSO;