How to add different countdown timer?

Questions & Answers
1

Im trying to make a 3 countdown timer but when i press a button all of them decreases at the same time. each countdown timer has a different length of time. 15, 30 and 22 seconds
void Update()
{
timer -= 1 * Time.deltaTime;
timer15currenttimer -= 1 * Time.deltaTime;
}

void OnGUI()
{
    if (exer == "30")
    {
        timer = 30f;
        tresttiemr.text = timer.ToString("0");
    }

    if (exer == "15")
    {

        countdownText.text = timer15currenttimer.ToString("0");
    }
}

public void fb()
{
    exer = "30";
    OnGUI();
}

public void sb()
{
    exer = "15";
    OnGUI();
}

this is what i use to try it.

2

You could use coroutines instead, for example:

IEnumerator CountDownTimer(int seconds)
{
    int TimeRemaining = Seconds;

    while (TimeRemaining > 0)
    {
        TimeRemaining -= 1;
         yield return new WaitForSeconds(1);
    }
}

And then call them like:

public void Start15SecTimer()
{
    StartCoroutine(CountDownTimer(15));
}

Remember to use System.Collections