Good Coroutine Example 1/2

PlayerFSM.cs

using System.Collections;
using UnityEngine;

public partial class PlayerFSM : MonoBehaviour 
{
	public enum PlayerState
	{
		Idle,
		Run,
	}

	public PlayerState currentState;	
	
	private bool _isNewState;
	
	private void OnEnable()
	{
		StartCoroutine("FSMMain");
	}

	private void Update()
	{
		if (Input.GetMouseButtonDown(0))
		{
			SetState(PlayerState.Run);
		}
		else
		{
			SetState(PlayerState.Idle);
		}
	}
	
	private void SetState(PlayerState newState)
	{
		_isNewState = true;
		currentState = newState;
	}
	
	private IEnumerator FSMMain()
	{
		while(Application.isPlaying)
		{
			_isNewState = false;
			yield return StartCoroutine(currentState.ToString());
		}
	}					
}