How do I decrease a slider over time?

Questions & Answers
1

Hello guys and gals,
the general idea is to create a slider which operates like health bar which decreases constantly over time so that the game is timebound and over after 5ish minutes. So far I have tried to set a countdown for the slider and entered the value of the total time to run down to zero like this:

public class Countdown : MonoBehaviour
{

public float timeLeft = 32100.0f;
public bool stop = true;

private float minutes;
private float seconds;

public void startTimer(float from)
{
    stop = false;
    timeLeft = from;
    Update();
}

void Update()
{
    if (stop) return;
    timeLeft -= Time.deltaTime;

    minutes = Mathf.Floor(timeLeft / 60);
    seconds = timeLeft % 60;
    if (seconds > 59) seconds = 59;
    if (minutes < 0)
    {
        stop = true;
        minutes = 0;
        seconds = 0;
    }
    //        fraction = (timeLeft * 100) % 100;
}

}
A very big thank you in advance

2

hey its just an easy example I hope it gives you the idea.

public Slider HealthBar;
public float health;
public float MaxHealth;// 1000

void Start(){
health=MaxHealth;
HealthBar= GetComponent<Slider> ();

HealthBar.maxValue =MaxHealth;
HealthBar.value = health;

}

void Update(){
health-=0.1f;
HealthBar.value = health;

}