Help AI going through walls

i need some help i made this AI but the enemy goes through walls this is my code (please write down the code so i can just copy it):

 using UnityEngine;
 using System.Collections;
 
 public class EneMyAI : MonoBehaviour {
     public Transform target;
     public int moveSpeed;
     public int rotationSpeed;
     public int maxdistance;
     
     private Transform myTransform;
     
     void Awake(){
         myTransform = transform;
     }
     
     
     void Start () {
         GameObject go = GameObject.FindGameObjectWithTag("Player");
         
         target = go.transform;
         
         maxdistance = 2;
     }
     
     
     void Update () {
         Debug.DrawLine(target.position, myTransform.position, Color.red); 
         
         
         myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed * Time.deltaTime);
         
         if(Vector3.Distance(target.position, myTransform.position) > maxdistance){
         
             myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;
             
         }
     }
     
 }