How to make a stopwatch that restarts every time the player dies and saves it as a highscore

So I’m trying to make a game where it records how long you last using a stopwatch. I searched all over the internet and I could not figure out how to combine my respawn or death script together with any stopwatch script! Here is my code for the respawn script that I place in the player, anyone smart enough to figure out how my respawn script works can you help me find a Stopwatch script and combine it together to Restart the Stopwatch when the player Respawns and Records it to a Highscore (and if you can make it save as a local file inside the game forever so when the player reopens the game it is there)

using UnityEngine;
using System.Collections;

public class respawn : MonoBehaviour
{
    public float threshold;

    void FixedUpdate()
    {
        if (transform.position.y < threshold)
            transform.position = new Vector3(0, 0, 0);
    }
}

Note: I an using C#

using UnityEngine;
using System.Collections;

 public class respawn : MonoBehaviour
 {
     public float threshold;
     float initialTime;

     void Start()
     {
              initialTime = Time.time;
              if(PlayerPrefs.HasKey("HighscoreTime")==false)
              {
                      PlayerPrefs.SetFloat("HighscoreTime",0);
              }
     }

     void FixedUpdate()
     {
         if (transform.position.y < threshold)//assuming this where you respawn
         {
             float TimeTaken = Time.time - initialTime;
             if ((TimeTaken)>PlayerPrefs.GetFloat("HighscoreTime"))//">" or "<" I'm not sure.. If the highscore is the highest time taken then ">" is right , otherwise change it to "<"
             {
                     print("Highscore time is " + TimeTaken);
                     PlayerPrefs.SetFloat("HighscoreTime",TimeTaken);
              }
             transform.position = new Vector3(0, 0, 0);
             initialTime = Time.time;//Fixed it
         }
     }
 }

You don’t have to save it in a local file thanks to PlayerPrefs.
I hope you understand the code I added its pretty intuitive… I haven’t really tested it but you should be able to fix any errors if any.

I think if you watch brackyes how to make a doge block game you will figure it out

Online Stopwatch Countdown Timer
September 28, 2020
It’s a really nice tool so what you can do here by the timeline -

Stopwatch slash

countdown timer is that you can put this into full-screen mode so

you got down here in the bottom and use the timer in full-screen

mode so I’m gonna go ahead