Need help calling a variable from another C# script

Questions & Answers
1

Here are my scripts, I’m trying to write a skillpoint selection for me and my friends game, he doesn’t understand scripting at all that’s why it’s retardedly commented. Anyway, I’m trying to get it to set the health to the players Stamina times 10, but it returns 0.

Here are my two scripts

Health.cs (Simple AI downloaded, edited the code)

using UnityEngine;
using System.Collections;

public class Health : MonoBehaviour {
	public float MaxHealth;
	public float CurrentHealth;
	public bool Invincible;
	public bool Dead;
	LevelUp levels = new LevelUp();
	
	
	// Use this for initialization
	void Start () {
		//MAKE THE CURRENT HEALTH THE MAX HEALTH AT START
		MaxHealth = levels.stamina * 10;
		CurrentHealth=MaxHealth;
	}
	
	void LevelUp() {
		MaxHealth = levels.stamina * 10;
		CurrentHealth = MaxHealth;
	}
	
	// Update is called once per frame
	void Update () {
		//IF INVINCIBLE, HE CANNOT DIE..
		if(Invincible){
			CurrentHealth=MaxHealth;	
		}
		else{
		if(CurrentHealth<=0){
			CurrentHealth=0;
			Dead=true;
		}	
			
		//MAX HEALTH
			if(CurrentHealth>=MaxHealth)CurrentHealth=MaxHealth;
			
			//WHEN DEATH IS UPON HIM
		if(Dead){
				//TELL THE AI SCRIPT HE IS DEAD
			FreeAI AI=(FreeAI)GetComponent("FreeAI");
				if(AI){
					if(AI.IsDead){}
					else AI.IsDead=true;
				}
			}
		}
	}
}

and here is the LevelUp.cs for stat handling and experience.

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class LevelUp : MonoBehaviour {
	
	/**
	 * 
	 * int = Integer, A variable for a number without a decimal point.
	 * bool = Boolean, A variable that returns true or false.
	 * float = Integer, A variable for a number WITH Decimal Points.
	 * char = Character, A variable for a single character, I.E   'A'  'B'  'C'
	 * string = Group of characters, for sentences such at "Hello, JewFace"
	 * 
	 **/
	
	//I don't understand this either;'
	public static LevelUp instance;
	
	//Current Experience.
	public int currExperience,
	expToLevel, //Experience needed to level.
	playerLevel; // Players Level
	
	
	// Stat Points
	public int strength, //Melee Damage
	stamina, // Health Stat
	agility,  // Movement Agility, Archer Damage
	dexterity, // CritRating - Acurracy.
	intelligence; // Mana Scaling.
	
	//This is called before script initialization.
	void Awake() { 
		
	}
	
	// Use this for initialization
	void Start () {
		instance = this;
		strength = 10;
		stamina = 10;
		agility = 10;
		dexterity = 10;
		intelligence = 10;
		currExperience = 0;
		expToLevel = 100;
		playerLevel = 1;
	}
	
	// Update is called once per frame
	void Update () {
		// Leveling up, if current experience is greater or equal to the required value, add experience to required level up value.
		if(currExperience >= expToLevel) {
			playerLevel += 1;
			expToLevel = expToLevel + (int)(expToLevel * 1.1);
		}
		
	}
	
	// Handles all GUI based functions, what's beign displayed.
	void OnGUI() {
			GUI.Box (new Rect(Screen.width / 2, Screen.height - 120, 260, 260), "");
	}
	
}
2

One thing jumps out at me in a quick read:

   LevelUp levels = new LevelUp();

You are using the new operator on a class derived from Monobehavior. Monobehavior derived classes need to be attached to game objects. You can remove this line, attach the script to a game object, and then link up the two. Or don’t derive the LevelUp class from Monobehavior. This means that you will need to change Start() to a class constructor and remove other Unity code like OnGUI(). Also the Update() method would need to be called from elsewhere (probably best to rename it as well).