What do you insert in the "" area in this timer? (00:00)

Questions & Answers
1

here is what I have so far

public text timerText;

float myTimer = 90;

void Update ()
{
    myTimer -= Time.deltaTime;

    SetTimerText();

    if (myTimer <= 0)
    {

    }

}

void SetTimerText()
{
    timerText.text = ""  + count.ToString();
}

}

2

Ok first of all i think you want to make a timer with this format: minutes:seconds right?
In your program there are various errors the most obvious seems to me that count is never defined.
I wrote a short script here to help you.

using UnityEngine;
using System.Collections;
//Needed to access Text component
using UnityEngine.UI;

public class Timer : MonoBehaviour 
{
	//you need a Text component attached to the gameobject
	Text timerText;
	public float myTimer = 90.0f;

	void Start()
	{
		//Initialize the text component
		timerText = GetComponent<Text> ();
	}

	void Update ()
	{
		SetTimerText();
		//Only decrease the timer when it is greater than 0 otherwise make sure that the timer is is not going to the negative part
		if (myTimer > 0.0f)
		{
			myTimer -= Time.deltaTime;
		} else
			myTimer = 0.0f;
	}
	void SetTimerText()
	{
		timerText.text = GetMinutes ().ToString ("00") + ":" + GetSeconds ().ToString ("00");;
	}

	float GetMinutes()
	{
		//return the greater integer when dividing -> 5/3 = 2
		return Mathf.Floor (myTimer / 60);
	}

	float GetSeconds()
	{
		//Modulus(remainder) of timer -> the remainder when dividing timer with 60 --> 125/60 = 2 + remainder 5
		return myTimer % 60;
	}
}

I hope it helps you
-Jorge