Health / progression bar

Hi there, i want to create a Health bar (bar that decreases when the players health goes down) I had a look around the forums and answers and found this code:

var barDisplay : float = 0;

var pos : Vector2 = new Vector2(20,40);
var size : Vector2 = new Vector2(60,20);
var progressBarEmpty : Texture2D;
var progressBarFull : Texture2D;</p>

function OnGUI()

// draw the background:
GUI.BeginGroup (new Rect (pos.x, pos.y, size.x, size.y));
    GUI.Box (Rect (0,0, size.x, size.y),progressBarEmpty);

    // draw the filled-in part:
    GUI.BeginGroup (new Rect (0, 0, size.x * barDisplay, size.y));
        GUI.Box (Rect (0,0, size.x, size.y),progressBarFull);
    GUI.EndGroup ();

GUI.EndGroup ();


function Update()
    // for this example, the bar display is linked to the current time,
    // however you would set this value based on your desired display
    // eg, the loading progress, the player's health, or whatever.
  barDisplay = Time.time * 0.05;


Which creates a bar that grows with time. However i want it to decrease with the players health. In the comments inside the Function Update it says that i need to replace the 'Time.time' with the appropriate command though i cannot figure out how to link it to the players health. I have tried the 3D Platformer tutorial but it starts to confuse me even more as it seems a lot more complex.

Here is the script that gives my player health:

var health = 10;

function ApplyDamage(damage : int) {
     health -= damage;

if(health <= 0) {


function Die () {
     //Respawn Player if wanted.</p>



This is for my college final major project so would love any help, thank you!

Sounds like you basically need to read about how to access variables and functions on other objects.

It's a bit of fundamental knowledge that you'll need to get to grips with before being able to do much else in unity scripting at all.