Unity Scripting global variable

I hope, that I can help you even though I'm using C#. It should be very easy to translate this to UnityScript.

using UnityEngine;

public class Score : MonoBehaviour
{
    public GUIText guiText;
    int score;

    void Update()
    {
        if(DeathTrigger.wasTriggered)
        {
            DeathTrigger.wasTriggered = false;
            score -= 100;
        }
        guiText.text = string.Format("Score: {0}", score);
    }
}

public class DeathTrigger : MonoBehaviour
{
    public static bool wasTriggered;

    void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.CompareTag("Ball"))
        {
            wasTriggered = true;
            // ...
        }
    }
}

I assume this is a beginner's questions, so I won't say anything about how static variables are evil and so on, but I still want to post an example of where to go next for a better approach:

using System;
using UnityEngine;
using UnityEngine.UI;

public class BetterDeathTrigger : MonoBehaviour
{
    // This event will be called when death is triggered.
    public static event Action wasTriggered;

    void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.CompareTag("Ball"))
        {
            // Call the event.
            if (wasTriggered != null)
                wasTriggered();
            // ...
        }
    }
}

public class BetterScore : MonoBehaviour
{
    public Text uiText; // Unity 4.6 UI system
    int score;

    void Start()
    {
        // Subscribe to the event.
        BetterDeathTrigger.wasTriggered += WasTriggered_Handler;
    }

    // This method will now be called everytime the event is called from the DeathTrigger.
    private void WasTriggered_Handler()
    {
        score -= 100;
        uiText.text = string.Format("Score: {0}", score);
    }
}

A couple of things:

• GUIText is pretty old and was already replaced by the new UI system since Unity version 4.6
• Static variables are not smart in the long run, prefer instances of objects unless you are very sure how statics work
• This is good example of where to use events. Again, it being static might lead to problems but for the first example it's the easiest.
• The Unity Learn site offers a lot of tutorials about programming concepts such as "Communicating between scripts", they also have basic game examples where you can follow along with a complete project.

It's definitely worth trying what Xarbrough suggested to go with instead. Statics can be confusing and get in the way in the long run. But here's how you can do it, written in Javascript.

public class Death { // you can change the class name to something that is broad enough to hold several public static variables
    public static var death : boolean;
}//This will end this class. When you make public classes like this, the script doesnt even need to be attached to a object, because it doesn't use Mono behavior

//This would be the actual DeathScript, whats above is technically not part of the Death script

var Ball : Transform;

function OnCollisionEnter (b : Collision) {
   if (b.gameObject.tag == "Ball"){
   Death.death = true;
   Ball.transform.position.x = 1.6;
   Ball.transform.position.y = 1.5;
   Ball.transform.position.z = 1.1;
   Ball.GetComponent.<Rigidbody>().velocity.y = 0;
   Ball.GetComponent.<Rigidbody>().velocity.x = 0;
   Ball.GetComponent.<Rigidbody>().velocity.z = 0;
 } }

From there, anytime you want to access the static variable, just tell it where to look. Death.death. Hope this helps!