How can I create a UI element and attach my script to it for a functional health bar?

Questions & Answers
1

Unity noob here, in the process of creating a 3D survival game. I wrote a script which handles player’s health, energy and stamina which I’ll paste below. Now, I would like to attach it to a UI health bar so the stat value dropping or increasing is visible to the player. How can I create a UI element and attach my script to it for this to work?

https://paste.ofcode.org/ctgys8bdmiQrN3apUmNBk7

Thanks

2

for future questions there is a little icon with 1’s and zeros above where you type your question within this website to post code so you dont have to use a third party “paste code site”. anyways, here is a simple health bar. good luck to you!

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

public class PlayerAttributesc : MonoBehaviour {
	
	//Attributes
	public static float health, stamina, energy,percent;
	public float maxHealth, maxStamina, maxEnergy;


	public Texture2D back;
	public Texture2D line;



	void OnGUI(){
		GUI.DrawTexture (new Rect (5, 5, 200,20), back);
		percent = health / maxHealth;
		if (percent > 0) {
						GUI.DrawTexture (new Rect (8, 8, 194 * percent, 14), line);
				}

	}
	void Start()
	{   maxHealth = 10;
		back = new Texture2D (1, 1);
		line = new Texture2D (1, 1);
		back.SetPixel (0, 0, Color.black);
		line.SetPixel (0, 0, Color.green);

		back.Apply ();
		line.Apply ();

		health = maxHealth;
		stamina = maxStamina;
		energy = maxEnergy;
	}
	
	void Update()
	{
		Debug.Log(health + "Health");  //Decrease health
		if (health <= maxHealth)
			health -= 0.5f * Time.deltaTime;  //per second
		if (health <= 0)  //Player death after health drops to 0
			death();
		if (health <= 0)
			print("You died. Remember, you need food to survive.");
		//---------------------------------------------------------------------------------------------------------//
		
		print(energy + "Energy");  //Decrease energy
		if (energy <= maxEnergy)
			energy -= 1f * Time.deltaTime;  //per second
		if (energy <= 0)  //Player death after energy drops to 0
			death();
		if (energy <= 0)
			print("You died. Remember, you need sleep to survive.");
		//---------------------------------------------------------------------------------------------------------//
		
		print(stamina + "Stamina");  //Decrease stamina if sprinting FIX
		if (Input.GetKey(KeyCode.LeftShift) && stamina > 0)
		{
			stamina -= 10f * Time.deltaTime;
		}
		else
		{
			stamina += 2f * Time.deltaTime;
		}
		if (stamina <= 0)
			print("You ran out of stamina. Wait a moment before sprinting again.");
	}
	void death(){


	}
}