Make NPC wait for a random time before walking away in cutscene

UOP1_Project/Assets/Scripts/Characters/NPC.cs

 using System.Collections;
-using System.Collections.Generic;
 using UnityEngine;
 
 public enum NPCState { Idle = 0, Walk, Talk};
 
 	public void SwitchToWalkState()
 	{
+		StartCoroutine(WaitBeforeSwitch());
+	}
+
+	IEnumerator WaitBeforeSwitch()
+	{
+		int wait_time = Random.Range(0, 4);
+		yield return new WaitForSeconds(wait_time);
 		npcState = NPCState.Walk;
 	}
 }