LoseNature.cs

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

public class LoseNature : MonoBehaviour
{
    private bool lostLife = false;
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.CompareTag("Player"))
        {
            if (!lostLife)
            {
                Debug.Log("il pert de la vie");
                collision.GetComponent<PlayerNature>().LooseNature(20);
                this.lostLife = true;
            }
        }
    }
}