Working health script?

Hi I have this script that I have from another question that I asked and was wondering how to make the health bar smaller when I get hit by tagged bullets

public float maxHealth = 100.0f; // Minimum health is 0.0f (dead)
public float currentHealth = 100.0f; // Players current health

public Texture2D background = null;

public Texture2D energybar = null;

void OnGUI()
// Draw the background

 GUI.DrawTexture(new Rect(32.0f, 32.0f, 128.0f, 16.0f), background);

 // Draw the health/energy bar

 GUI.BeginGroup(new Rect(34.0f, 34.0f, 124.0f * (currentHealth / maxHealth), 12.0f));
   GUI.DrawTexture(new Rect(0.0f, 0.0f, 124.0f, 12.0f), energybar);

What do you mean by smaller? Do you mean that the GUI should be smaller? Try editing the last two parameters in the Rect's.

If you mean that when I get hit, I receive 10% of my life, so show only 90%. Then you just need to subtract currentHealth with the amount you lost.

This is easier. Try this.

    using UnityEngine;
    using UnityEngine.UI;
    using System.Collections;
    public class PlayerHealth : MonoBehaviour 
        public float maxHealth; //Your players max Health
        public float curHealth;  //Your players current health
        public Scrollbar healthBar;  //Unity UI Scrollbar Image named healthBar
    void Update()
        //Call HealthBar function, pass it a 0 to avoid object reference error
       //The HealthBar function
        public void HealthBar(float adj) 
        //Will create a variable named percentile based on the current health divided by the max health multiplied by 100.
        float healthPercentile = ((float)curHealth / (float)maxHealth) * 100f; 

//Will rescale a scrollbar set to FILL type by the percentile variable multiplied by 100.
        healthBar.size = healthPercentile / 100f;