How to create simple timer in Unity

With this timer, we can load a scene and run this timer, that if this timer reaches it’s end, another scene will be loaded.

First we need to create a countDown variable, enter value in seconds, for example if you want 3 seconds for the timer, type this:

float countDown = 3f;

Put that code before Start() (outside any methods). Than, inside Update() method, make an if statement like this:

if (countDown > 0)
			countDown -= Time.deltaTime;
		else
			Application.LoadLevel ("StartScene");

Here is the full script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SimpleTimer : MonoBehaviour {

        float countDown = 3f;
	
	void Update () {
		if (countDown > 0)
			countDown -= Time.deltaTime;
		else
			Application.LoadLevel ("SomeScene");
	}
}