Start timer on button press

Hey guys,
I have a countdown timer that works but I want it to only start when the player presses the space button. I also want the timer to reset when the player dies. When the player dies he/she re-spawns back at the start of the level but timer does not reset.
Could anyone help me? Thanks :slight_smile:

using UnityEngine;
using System.Collections;

public class CountdownTimer : MonoBehaviour {

public GUIText _TimeText;
private float timer = 60f;
public float addTime = 10;

public GUIStyle customGuiStyle;

void Start(){

}
void OnGUI() {
	int minutes = Mathf.FloorToInt(timer / 60F);
	int seconds = Mathf.FloorToInt(timer - minutes * 60);
	
	string niceTime = string.Format("{0:0}:{1:00}", minutes, seconds);
	
	GUI.color = Color.yellow;
	GUI.Label(new Rect(850,10,250,100), niceTime, customGuiStyle);
}


void Update(){
	timer -= Time.deltaTime;
	
	
	
	if (timer <= 0) {
		Application.LoadLevel("Level 3 Incomplete");
	}
	
	
	
}

void OnTriggerEnter(Collider other)
{
	if(other.gameObject.tag == "PickUp")
	{
		
		
		Destroy(other.gameObject);
		timer += addTime; 
		
		
	}
}

}

Perhaps it is, because you are not telling the thing to reset the timer? Maibe, when

if (timer <= 0) {
     Application.LoadLevel("Level 3 Incomplete");
 }

You can make the variable have a new definition?

Something like :

timer = Time.deltaTime + timerAmount increment