Unity : Can i see an example of how to do simple native threaded code?

Threadqueuer.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Threading;
using System;
public class Threadqueuer : MonoBehaviour
{

    List<Action> functionsToRunInMainThread;

    private void Start()
    {
        Debug.Log("Started() -- Started");

        functionsToRunInMainThread = new List<Action>();

        //WHEN WE DEBUG //SlowFunctionThatDoesAUnityThing();
        //NO INPUT PARAMETRS //StartThreadedFunction(SlowFunctionThatDoesAUnityThing);
        StartThreadedFunction(() => { SlowFunctionThatDoesAUnityThing(Vector3.up, new float[5], new Color[100]);  });

        Debug.Log("Started() -- Done");
    }

    private void Update()
    {
        //Update always runs in the main thread
        while(functionsToRunInMainThread.Count > 0)
        {
            //Grad the first/olderst functions in the list 
            Action someFunc = functionsToRunInMainThread[0];
            functionsToRunInMainThread.RemoveAt(0);

            //Now run it
            someFunc();
        }

    }

    public void StartThreadedFunction( Action someFunction)
    {
        Thread t = new Thread(new ThreadStart(someFunction));
        t.Start();
    }

    public void QueueMainThreadFunction(Action someFunction)
    {
        //We need to make sure that someFunction is running from the
        //main thread

        functionsToRunInMainThread.Add(someFunction);

    }

    void SlowFunctionThatDoesAUnityThing( Vector3 foo, float[] bar, Color[] pixels)
    {

        //First we do a really slow thing
        Thread.Sleep(5000); //sleep for 2 seconds

        //Now we need to modifie a Unity gameobject
        Action aFunction = () =>
        {
            Debug.Log("The results of the child thread are being applied to the Unity GameObject safely.");
            this.transform.position = new Vector3(1, 1, 1); // NOT ALLOWD FROM CHILD THREAD
        };

        //NOTE: We still arent allowed to call this from child thread
        QueueMainThreadFunction(aFunction);
        

    }
}