How do you end the game and make the game over screen appear when health = 0 ?,How do I make my game over screen appear when the health of the player is lower then 0

The player has to be hit 3 times (health <= 0) before the game over screen appears. The problem is that it keeps counting -1 -2 -3... How do I fix this?

these are my scripts that I used.

PlayerStats

 public class PlayerStats : MonoBehaviour {
     public Image healthBar;
     
     public float cur_health = 3f;
 
     public static int Cur_health { get; internal set; }
 
     private void Start()
     {
         cur_health = 3f;
         SetHealthBar();
     }
 
     public void TakeDamage(float amount)
     {
         cur_health -= amount;
         SetHealthBar();
         
     }
 
     public void SetHealthBar()
     {
         float my_health = cur_health;
         healthBar.transform.localScale = new Vector3(Mathf.Clamp(my_health, 0f, 1f), healthBar.transform.localScale.y, healthBar.transform.localScale.z);
     }
    
 }

enemy damage

 public class FallingBlocksDamage : MonoBehaviour {
 
     float damage = 1f;
 
     private void OnTriggerEnter(Collider other)
     {
         other.gameObject.GetComponent<PlayerStats>().TakeDamage(damage);
     }
 
 

game over manager

 public class GameOver1 : MonoBehaviour {
 
     public static GameOver instance;
     public GameObject gameOverScreen;
     public Text secondsSurvivedUI;
     public bool gameOver = false;
 
     void Start()
     {
         FindObjectOfType<move1> ().OnPlayerDeath += OnGameOver;
     }
 
     void Update()
     {
 
 
 
         if (gameOver)
             {
                 if (Input.GetKeyDown(KeyCode.Space))
                 {
                     SceneManager.LoadScene("main scene");
                 }
             }
     }
 
         void OnGameOver() {
         gameOverScreen.SetActive(true);
         secondsSurvivedUI.text = Mathf.RoundToInt(Time.timeSinceLevelLoad).ToString();
         gameOver = true;
         }
     
 }
 

pls help me

,I Want my player to die and my game over screen to pop up. The player has to be hit 3 times before the screen pops up but when my health is lower the 0 it keeps counting -1 -2 -3... how do I fix this? these are my scripts

PlayerStats

 public float cur_health = 3f;
 public Image healthBar;

 public static int Cur_health { get; internal set; }

 private void Start()
 {
     cur_health = 3f;
     SetHealthBar();
 }

 public void TakeDamage(float amount)
 {
     cur_health -= amount;
     SetHealthBar();
     
 }

 public void SetHealthBar()
 {
     float my_health = cur_health;
     healthBar.transform.localScale = new Vector3(Mathf.Clamp(my_health, 0f, 1f), healthBar.transform.localScale.y, healthBar.transform.localScale.z);
 }

enemy damage script

 {
 
     float damage = 1f;
 
     private void OnTriggerEnter(Collider other)
     {
         other.gameObject.GetComponent<PlayerStats>().TakeDamage(damage);
     }
 
 
 
 }

game over manager

  public static GameOver instance;
     public GameObject gameOverScreen;
     public Text secondsSurvivedUI;
     public bool gameOver = false;
 
     void Start()
     {
         FindObjectOfType<move1> ().OnPlayerDeath += OnGameOver;
     }
 
     void Update()
     {
 
 
 
         if (gameOver)
             {
                 if (Input.GetKeyDown(KeyCode.Space))
                 {
                     SceneManager.LoadScene("main scene");
                 }
             }
     }
 
         void OnGameOver() {
         gameOverScreen.SetActive(true);
         secondsSurvivedUI.text = Mathf.RoundToInt(Time.timeSinceLevelLoad).ToString();
         gameOver = true;
         }
     
 }

How do I fix this?