unity how to make code wait code example

Example 1: how to make a method wait in unity

public float timeLeft = 30.0f

void Update()
{
  timeLeft -= Time.deltaTime;
            if (timeLeft < 0)
            {
            //Do your method here
            }
}

Example 2: wait time in unity

using System.Collections;

private void Start()
{
	StartCoroutine(Wait());
}

IEnumerator Wait()
{
	//To wait, type this:
  
  	//Stuff before waiting
	yield return new WaitForSeconds(/*number of seconds*/);
  	//Stuff after waiting.
}