Scripting problems!

Unity Engine
,
1

I am making a tower defense and i wan’t my enemies to have a hp-bar over their head. The only problem i have is that ones the enemy has gotten damaged it don’t get damaged a second time! How do i resolve this?

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

public class hpScaleDino : MonoBehaviour
{
    GameObject hp;
    [SerializeField]
    public float x = 0.1f;
    [SerializeField]
    public float y = 0.1f;
    [SerializeField]
    public float z = 0f;

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

    // Update is called once per frame
    void Update()
    {
       
    }
    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.tag == "Tower1")
        {
            hp.transform.localScale -= new Vector3(x, y, z);
            print("hit");
        }
    }
}
2

@Gabriel13375

Why did you add a poll for no reason - you are asking a question…?

Yeah, and it would help, if you put effort to your question - where have you attached this script to for example? What else happens to Tower1?