2d shooter spikes phan 4

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

public class spikes : MonoBehaviour {

    public float health = 100;

    private void FixedUpdate()
    {
        if (health <= 0)
            gameObject.SetActive(false);

    }
    void Damage(int dmg)
    {
        health -= dmg;
    }

}