Changing Slider Value

[mattyg55]

I have a slider that has a maximum value of 5. Everytime my gameObject "Car" collides with a gameObject "Cone," the slider should decrease value by 1. Currently, the slider is decreasing from 5 to 0 when a cone is hit. Would someone please be able to explain to me why I cannot get the value to decrease only by 1? Thanks in advance.

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


public class moveCar : MonoBehaviour
{
    public GameObject car;

    public static int movespeed = 100;

    public GameObject road;

    float offset = 1000f;

    public Slider slider;

    int health = 5;


    public void start()
    {
    }
    public void Update()
    {
        transform.position += (Vector3.forward * movespeed * Time.deltaTime);

        if (Input.GetKey(KeyCode.RightArrow))
        {
            this.transform.Translate(Vector3.right * 1f);
        }
        if (Input.GetKey(KeyCode.LeftArrow))
        {
            this.transform.Translate(Vector3.left * 1f);
        }
    }
    //    // Start is called before the first frame update
    //    void Start()
    //    {

    //    }

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

    //    }
    //}

    private void OnTriggerEnter(Collider col)
    {
        if(col.name == "roadTigger")
        {
            //roadCreator.createRoad();

            Vector3 newPosition = new Vector3(0f, 0f, car.transform.position.z + offset);

            Instantiate(road, newPosition, Quaternion.identity);
            Debug.Log("road created");

        }

        if(col.CompareTag("Cone"))
        {
            
            slider.value = health;
            health = health - 1;
            Destroy(col);
        }

      
    }
  
}

 

[Skydiver]

Set a breakpoint on your line 68 and see how many times it gets called.