error CS0713 UnityEngine.MonoBehaviour'. Static classes must derive from object

I've add the static code to the MyClock script and it giving me this error. I need to gain access to MyClock script from PlayerPreference script . The only way I can access my clock is by making the script static and I did that . But I getting error. Here the my clock script and PlayerPreference Script:

using UnityEngine; using UnityEngine.UI; using UnityEngine.SceneManagement; using System.Collections;

public static class MyClock : MonoBehaviour { public string time; public int Minutes = 0; public int Seconds = 0;

   public Text    m_text;
   public float   m_leftTime;
  
   public void Start()
   {

       m_text = GetComponent<Text>();
       m_leftTime = GetInitialTime();
   }
  
   public void Update()
   {
       if (m_leftTime > 0f)
       {


           //  Update countdown clock
           m_leftTime -= Time.deltaTime;
           Minutes = GetLeftMinutes();
           Seconds = GetLeftSeconds();

           //  Show current clock
           if (m_leftTime > 0f)
           {
                             
               m_text.text = "Time : " + Minutes + ":" + Seconds.ToString("00");
           }
           else
           {
               //  The countdown clock has finished
               m_text.text = "Time : 0:00";
           }
       }
   }
  
   private float GetInitialTime()
   {
       return Minutes * 60f + Seconds;
   }
  
   private int GetLeftMinutes()
   {
       return Mathf.FloorToInt(m_leftTime / 60f);
   }
  
   private int GetLeftSeconds()
   {
       return Mathf.FloorToInt(m_leftTime % 60f);
   }

}

using UnityEngine.SceneManagement; using UnityEngine; using UnityEngine.UI; using System.Collections; using myclock;

public class PlayerPreference : MonoBehaviour { private ScoreManager scoreManagerScript ; public GameObject player; private myclock MyClockScript;

  void Awake () 
  {
     GameObject Player = GameObject.FindWithTag("Player");
     scoreManagerScript  = Player.GetComponent<ScoreManager>();
      MyClockScript = GetComponent<myclock>();
  }
  
  void Update(){
      
      if ((myclock!= NULL) && (scoreManager != NULL)  &&
  (myclock.m_leftTime >= scoreManager.score))
  {
       SceneManager.LoadScene("time");
      
  }
      
  }     
  
  }