gather-and-defend/Assets/Scripts/Opponent/Opponent.cs

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

public class Opponent : Entity
{

    private Vector2 _movementVector = Vector2.zero;
    private Rigidbody2D _rigidbody;

    void Start()
    {
        _rigidbody = GetComponent<Rigidbody2D>();
    }

    void Update() {

        _movementVector.x = -Time.deltaTime * Speed;

        _movementVector.Normalize();

        _rigidbody.velocity = _movementVector * Speed;

        if(IsEnemyDetected) {
            AttackEnemy();
        }

    }

    void AttackEnemy() {
        //Attack Cooldown
        if(AttackSpeed < AttackSpeedWait) 
        {
                Enemy.Hp-=AttackDamage;
                Debug.Log("Ally Hp = " + Enemy.Hp);

                //Kill if no hp
                if(Enemy.Hp <= 0) {
                    Destroy(Enemy);
                }

                AttackSpeedWait = 0f;
            }

            AttackSpeedWait += Time.deltaTime;
    }

}