diff --git a/Assets/02_Scripts/PlayerController.cs b/Assets/02_Scripts/PlayerController.cs
index 7c66a0e..0b9cc6f 100644
--- a/Assets/02_Scripts/PlayerController.cs
+++ b/Assets/02_Scripts/PlayerController.cs
@@ -15,3 +15,12 @@ public class PlayerController : MonoBehaviour
         transform.position += Vector3.forward * 0.01f;
     }
 }
+
+/*
+    Vector3.forward = Vector3(0, 0, 1)
+    Vector3.up      = Vector3(0, 1, 0)
+    Vector3.right   = Vector3(1, 0, 0)
+
+    Vector3.one     = Vector3(1, 1, 1)
+    Vector3.zero    = Vector3(0, 0, 0)
+*/