What script should I use to make a countdown timer bar?

Hi,

You can try this script. Create a new c# script called CountDownBar. Attach the below code to it. Save and go to Unity. Add the script to a gameobject.

In the inspector create a Slider. And attach the slider to the script. Press play and the slider should go up and down.

 using UnityEngine;
 using UnityEngine.UI;
 
 public class CountDownBar : MonoBehaviour
 {
     public static bool allowInputs;
 
     public Slider countdownBar;
     private bool countDown = true;
 
     public float countDownTime = 8;
     public float refillTime = 10;
 
     private void Start()
     {
         //Set the max value to the refill time
         countdownBar.maxValue = refillTime;
     }
 
     private void Update()
     {
         if (countdownBar.maxValue != refillTime)
             countdownBar.maxValue = refillTime;
 
             if (countDown) //Scale the countdown time to go faster than the refill time
             countdownBar.value -= Time.deltaTime / countDownTime * refillTime;
         else
             countdownBar.value += Time.deltaTime;
 
         //If we are at 0, start to refill
         if (countdownBar.value <= 0)
         {
             countDown = false;
             allowInputs = false;
         }
         else if (countdownBar.value >= refillTime)
         {
             countDown = true;
             allowInputs = true;
         }
     }
 }

To prevent inputs, go to the script that uses inputs, and just before it add a check if you can allow inputs.

     void CheckInput()
     {
         if (!CountDownBar.allowInputs)
             return;
 
         //Your code for handling inputs
     }

And that should be it.

Hope that helps