Object reference not set to an instance of an object и генерация облаков

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Clouds : MonoBehaviour
{
    public Sprite[] clouds = new Sprite[] {}; 
    private List<Cloud> cloudsList;
    public int MinSpeed; 
    public int MaxSpeed;
    public int MinDelay;
    public int MaxDelay;
    private GameObject go;
   void Awake()
    {
        for(int i = 0; i < clouds.Length; i++)
        {   
            Debug.Log("1");
            go = new GameObject("Cloud");
            go.transform.SetParent(transform);
            cloudsList.Add(new Cloud (go,0,0));
 
            Debug.Log("2");
            cloudsList[i].Go.GetComponent<SpriteRenderer>().sprite = clouds[i];
            DelayF(cloudsList[i]);
            SpeedF(cloudsList[i]);
                        Debug.Log("3");
            if (gameObject.name == "Left")
            {
                cloudsList[i].Go.tag = "Left";
            }
            else if (gameObject.name == "Right")
            {
                cloudsList[i].Go.tag = "Right";
            }
        }
    }
 
    void FixedUpdate()
    {
 
    }
 
    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.transform.tag == "Left" || collision.transform.tag == "Right")
        {
            if (gameObject.name == "Right")
            {
                if (collision.gameObject.tag == "Left")
                {
                }
            }
            if (gameObject.name == "Left")
            {
                if (collision.gameObject.tag == "Right")
                {
 
                }
            }
        }
    }
 
    private void DelayF(Cloud cloud)
    {
        System.Random rand = new System.Random();
        cloud.Delay = rand.Next(MinDelay,MaxDelay);
    }
 
    private void SpeedF(Cloud cloud)
    {
        System.Random rand = new System.Random();
        cloud.Speed = rand.Next(MinSpeed, MaxSpeed);
    }
 
    private void transformF(Cloud cloud)
    {
        System.Random rand = new System.Random();
 
        cloud.Go.transform.position = new Vector2(transform.position.x, rand.Next(0, Mathf.RoundToInt(cloud.Go.GetComponent<BoxCollider2D>().size.y))) ;
    }
 
    private IEnumerator d(Cloud cloud)
    {
        cloud.Go.SetActive(false);
        yield return new WaitForSeconds(cloud.Delay);
        cloud.Go.SetActive(true);
        DelayF(cloud);
 
    }
 
    private IEnumerator move(Cloud cloud)
    {
        while (cloud.Go.activeInHierarchy == true)
        {
            if (cloud.Go.tag == "Left")
            {
                    cloud.Go.GetComponent<Rigidbody2D>().velocity = new Vector2(cloud.Speed * 1, cloud.Go.GetComponent<Rigidbody2D>().velocity.y);
            }
            else if (cloud.Go.tag == "Right")
            {
                    cloud.Go.GetComponent<Rigidbody2D>().velocity = new Vector2(cloud.Speed * -1, cloud.Go.GetComponent<Rigidbody2D>().velocity.y);
            }
        }
        yield return null;
    }
}
 
//public interface IGo { GameObject Go { get; set; } }
//public interface ISpeed { int Speed { get; set; } }
//public interface IDelayed { int Delay { get; set; } }
public class Cloud
{
    public GameObject Go { get; set; }
    public int Speed { get; set; }
    public int Delay { get; set; }
    public Cloud (GameObject Go, int Speed, int Delay)
    {
        this.Go = Go;
        this.Speed = Speed; 
        this.Delay = Delay;
        this.Go.gameObject.AddComponent<SpriteRenderer>();
        this.Go.gameObject.AddComponent<BoxCollider2D>();
        this.Go.gameObject.AddComponent<Rigidbody2D>();
        this.Go.gameObject.GetComponent<BoxCollider2D>().size = new Vector2(1, 1);
        this.Go.gameObject.GetComponent<Rigidbody2D>().bodyType = RigidbodyType2D.Kinematic;
        this.Go.gameObject.GetComponent<Rigidbody2D>().constraints = RigidbodyConstraints2D.FreezeRotation;
    }
}

            
cloudsList.Add(new Cloud (go,0,0));