Health bar losing health

Questions & Answers
1

GameManager.cs

using UnityEngine;
using System.Collections;

public class GameManager : MonoBehaviour {

	//Player Life
	public Texture playersHealthTexture;

	//Control Screen Position of Texture
	public float screenPositionX;
	public float screenPositionY;

	//Controls Icon Size on Screen
	public float iconSizeX = 25;
	public float iconSizeY = 25;

	//Starting lives
	public int playersHealth = 5;
	
	void OnGUI(){

		//Controls Players Health Textures
		for(int h = 0; h < playersHealth; h++){
			GUI.DrawTexture(new Rect(screenPositionX + (h * iconSizeX), screenPositionY, iconSizeX, iconSizeY), playersHealthTexture,ScaleMode.ScaleToFit, true, 0);
		}
	}

	void PlayerDamaged(int damage){

		if (playersHealth > 0) {
			playersHealth -= damage;
		}

		if(playersHealth <= 0){
			playersHealth = 0;
			RestartScene();
		}
	}

	void RestartScene(){
		Application.LoadLevel(Application.loadedLevel);
	}

}


Enemy.js

#pragma strict

private var fall : boolean;
var Player : GameObject;
var spawnPoint : Transform;
var stomp : boolean;

function Update () {
	if(stomp){
		transform.position.z = 4;
		transform.localScale.y /= 2;
		fall = true;
		gameObject.GetComponent(PlatformMover).step = 0.0;
		stomp = false;
		
	}
	
	if(fall){
		transform.position.y -= 0.05;
	}
	if(transform.position.y < -25){
		Destroy(gameObject);
	}	
}	
	
function OnTriggerEnter(other : Collider){
	if(!stomp){
		if(other.tag == "Player"){	
			Destroy(other.gameObject);
			var P : GameObject = Instantiate(Player, spawnPoint.position, Quaternion.identity);
			var sf = Camera.main.GetComponent(SmoothFollow2);
			sf.target = P.transform;
		}	
	}		
}



ok so far i have my health bar showing But i 
need it to subtract 1 out of 5 hearts every time
 the enemy kills my player. 
Can someone help me out with finishing that code and show me where to put it?
2

You can write a OnTrigger Function in the Player Script. Whenever the player enters the enemy’s collider call the PlayerDamage Function… Example -

//In your Player Script

void OnTriggerEnter(Collider col){
if(col.collider.name == "Enemy"){
GameManager.PlayerDamage();//Make the PlayerDamage Function static or call it by instance
}
}