using UnityEngine;

public class EnemyFireMissile : MonoBehaviour
{
    public GameObject enemyMissilePrefab;
    public float speed;
    private float timer;
    public float interval;

    void Update()
    {
        timer += Time.deltaTime;

        if (timer > interval)
        {
            GameObject enemyMissile = Instantiate(enemyMissilePrefab, transform.position, transform.rotation);
            Rigidbody enemyMissileRb = enemyMissile.GetComponent<Rigidbody>();
            enemyMissileRb.AddForce(transform.forward * speed);
            Destroy(enemyMissile, 5.0f);

            timer = 0;
        }
    }
}

using UnityEngine;

public class LookAt : MonoBehaviour
{
    private GameObject target;

    void Start()
    {
        target = GameObject.Find("Player");
    }

    void Update()
    {
        if(target)
        {
            transform.LookAt(target.transform.position);
        }
    }
}