Resupply Problem

Hello, I am working on a game in wich there are units that are fighting against each other. Now I want resupply for my units. This works by adding the life of the unit a certain number over time(if somone knows how to improve this i would be gratefull). If an enemy unit now comes near, the friendly unit´s supply should drop, and if it is gone it should be normal. But it Is constantly counting the resupply value down to infinity. It should look something like this: Reupply normal: 2, Enemy there: Resupply 1; Enemy gone again: Resupply 2. Pls help.`using System.Collections; using System.Collections.Generic; using UnityEngine;

public class Enemy : MonoBehaviour {

 public float resup;
 public float health;

 public void Resup(float resupx)
 {

     resup -= resupx;


 }





 public void Update()
 {



     health += resup * Time.deltaTime;



 }

 public void TakeDamage(float damage)
 {
     health -= damage;

     if(health < 1)
     {
         Destroy(gameObject);
        
     }
 }

} using System.Collections; using System.Collections.Generic; using UnityEngine; public class UnitBattel : MonoBehaviour { // Start is called before the first frame update public LayerMask whatIsEnemy; public float attackRange; public bool enemyInAttackRange; public float damage; public float resupx; [SerializeField] private float range; // Update is called once per frame void Update() { enemyInAttackRange = Physics.CheckSphere(transform.position, attackRange, whatIsEnemy); if (enemyInAttackRange) AttackPlayer(); } private void AttackPlayer() { Collider[] colliderArray = Physics.OverlapSphere(transform.position, range); foreach (Collider collider in colliderArray) { if (collider.TryGetComponent<Enemy>(out Enemy enemy)) { enemy.TakeDamage(damage); enemy.Resup(resupx); return; } } } }