ProgressBar.cs

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

[ExecuteInEditMode]
public class ProgressBar : MonoBehaviour
{
    [Header("Title Setting")]
    public string Title;
    public Color TitleColor;
    public Font TitleFont;
    public int TitleFontSize = 10;

    [Header("Bar Setting")]
    public Color BarColor;
    public Color BarBackGroundColor;
    public Sprite BarBackGroundSprite;
    [Range(1f, 100f)]
    public int Alert = 20;
    public Color BarAlertColor;

    [Header("Sound Alert")]
    public AudioClip sound;
    public bool repeat = false;
    public float RepeatRate = 1f;

    private Image bar, barBackground;
    private float nextPlay;
    private AudioSource audiosource;
    private Text txtTitle;
    private float barValue;
    public float BarValue
    {
        get { return barValue; }

        set
        {
            value = Mathf.Clamp(value, 0, 100);
            barValue = value;
            UpdateValue(barValue);
        }
    }

    private void Awake()
    {
        bar = transform.Find("Bar").GetComponent<Image>();
        barBackground = GetComponent<Image>();
        txtTitle = transform.Find("Text").GetComponent<Text>();
        barBackground = transform.Find("BarBackground").GetComponent<Image>();
        audiosource = GetComponent<AudioSource>();
    }

    private void Start()
    {
        txtTitle.text = Title;
        txtTitle.color = TitleColor;
        txtTitle.font = TitleFont;
        txtTitle.fontSize = TitleFontSize;

        bar.color = BarColor;
        barBackground.color = BarBackGroundColor;
        barBackground.sprite = BarBackGroundSprite;

        // Initialize the bar value to full health
        BarValue = 100;
    }

    void UpdateValue(float val)
    {
        bar.fillAmount = val / 100;
        txtTitle.text = Title + " " + val.ToString("F0") + "%"; // F0 for no decimal places

        if (Alert >= val)
        {
            bar.color = BarAlertColor;
        }
        else
        {
            bar.color = BarColor;
        }
    }

    private void Update()
    {
        if (!Application.isPlaying)
        {
            UpdateValue(50); // For editor preview
            txtTitle.color = TitleColor;
            txtTitle.font = TitleFont;
            txtTitle.fontSize = TitleFontSize;

            bar.color = BarColor;
            barBackground.color = BarBackGroundColor;
            barBackground.sprite = BarBackGroundSprite;
        }
        else
        {
            if (Alert >= barValue && Time.time > nextPlay)
            {
                nextPlay = Time.time + RepeatRate;
                audiosource.PlayOneShot(sound);
            }
        }
    }

    // Call this method from the PlayerScript when the player takes damage
    public void UpdateHealth(float currentHealth, float maxHealth)
    {
        BarValue = (currentHealth / maxHealth) * 100;
    }
}