About the door animation trigger

Hi. I'm trying to make when Player goes to trigger, the door opens and closes when exiting the trigger. I know that I should use OnTriggerEnter and OnTriggerExit.. But this is the first time I'm using animation to trigger. So I'm little confused. I want to make animation happens by code not animator. I think animator is useless when it gets to trigger. I set like this. I made DoorOpen DoorClose animations and put those animations to Door's animator.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class DoorController : MonoBehaviour {
 
     // Use this for initialization
     void OnTriggerEnter (Collider other) 
     {
         if(other.CompareTag("Player")
         {
             blahblahblah
         
     }
     
     // Update is called once per frame
     void OnTriggerExit ()
     {
         blahblahblah        
     }
 }
 
 

Please help me! If you have better idea, thats fine. Tell me all!