Transform.position more smoother?

I have this script to move my door(just closing with trigger).

How to make transform more smoother?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Doors : MonoBehaviour
{
	[SerializeField]
	GameObject door;

	private bool isTriggered = false;

	void OnTriggerEnter(Collider col)
	{
		if(isTriggered == false)
		{
			isTriggered = true;
			door.transform.position += new Vector3(-8,0,0);
		}
	}
}