When Score goes up by 25 change timer value

Questions & Answers
1

In my Game i want to make it for every 25 points the timer goes down by 0.25 seconds. How cn i do this with these 2 sets of codes?

using UnityEngine;
using UnityEngine.UI;

public class KeepScoreManager : MonoBehaviour
{
    public Text ScoreText;
    private int score;
    public Text NewBest;



    public void IncreaseScore(int increment)
    {
       NewBest.text = PlayerPrefs.GetInt("NewBest").ToString();

        score += increment;
        if (score > PlayerPrefs.GetInt("NewBest"))
        {
            PlayerPrefs.SetInt("NewBest", score);
            NewBest.text = PlayerPrefs.GetInt("NewBest").ToString();
        }

        ScoreText.text = score.ToString();
    }
}

and the timer;

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class CountdownScript : MonoBehaviour
{
    [SerializeField] private Text uiText;
    [SerializeField] private float mainTimer;
    [SerializeField] private GameObject panel;

    void Start()
    {
        timer = mainTimer;
    }

    public float timer;
    private bool canCount = true;
    private bool doOnce = false;

    void Update()
    {
        if (timer >= 0.0f && canCount)
        {
            timer -= Time.deltaTime;
            uiText.text = timer.ToString("F");
        }

        else if (timer <= 0.0f && !doOnce)
        {
            canCount = false;
            doOnce = true;
            uiText.text = "0.00";
            timer = 0.0f;
            panel.SetActive(true);
        }
    }

    public void ResetBtn()
    {
        timer = mainTimer;
        canCount = true;
        doOnce = false;
    }
}
2

using UnityEngine;
using UnityEngine.UI;

 public class KeepScoreManager : MonoBehaviour
 {
     public Text ScoreText;
     private int score;
     CountdownScript countdown;
     public Text NewBest;
 
    private void Start()
{
countdown = GameObject.FindObjectOfType<CountdownScript>();
}
 
     public void IncreaseScore(int increment)
     {
        NewBest.text = PlayerPrefs.GetInt("NewBest").ToString();
 
         score += increment;
         changeTime += increment;
         if (score > PlayerPrefs.GetInt("NewBest"))
         {
             PlayerPrefs.SetInt("NewBest", score);
             NewBest.text = PlayerPrefs.GetInt("NewBest").ToString();
         }
 
         ScoreText.text = score.ToString();
         if(changeTime >= 25)
        {
             countdown.ChangeTime();
             changeTime = 0;
        }
     }
 }

And then somewhere in your CountdownScript, add this:

public void ChangeTime()
{
timer -= .25f //You could also assign a public variable in case you want this value different at times, but this should do what you are asking.
}