Updating UI Slider through another script

Right now I have a script controlling a slider basically making it at like a game meter. The meter starts at a max value in this case 10 and over time the meter decreases in value. (So a 10 second timer/meter)

 static var val : float = 10f;
 var meter : GameObject;

 function Update() {
     if(gameStart == true) {
         
         if(objectController.objectDestroyed == true) {
             meter.value = meter.value + val;
         } else {
             meter.value -= Time.deltaTime;
         }
     }
 }

I'm checking my object controller to see if the object has been destroyed then, if it has, add more time to the meter basically keeping you alive unless it hits 0.

 function OnMouseDown() {
     
     Destroy(gameObject);
     
     // Set SD to true
     objectDestroyed = true;
     // Add time to meter
     levelUI.val = 10f;
     // Reset SD to false
     objectDestroyed = false;
 
 }

So since I couldn't change the actual slider value via my objectController script. I decided to add a boolean to check whether or not the object has been destroyed. The code isn't breaking, but when I check the console to what objectDestroyed is, it's always false. Am I doing this too fast, or is this just not the way it should be done.