Scripting for looking at an object long enough to trigger an event.

I'm not real familiar with the lingo for scripting and i'm sure if I knew the correct word to search for I would find what I'm looking for. What is the language that will trigger an event after you look at the object for a few seconds?

I'm trying to create a Gear VR Drive in theater and when you look at the theater screen for like 3 seconds it will load a full screen video. I read that you can't have a movieTexture in a VR environment in Unity so I figured I'd just make it load a new scene where the movie is in full screen.

 

So I think I may have found what I am looking for but I need some help tailoring it to OVR Camera as I'm getting a "NullReferenceException Object reference not set to an instance of an object" error. And I think it's because I'm not using the standard MainCamera.

Created a JS with:

Code (csharp):

1. #pragma strict
2. //Type the name of the scene to load in the inspector.
3.  
4. var MovieTestScene : String ;
5.  
6. var hit: RaycastHit;
7.  
8. function Update (){
9.  
10. var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
11.  
12. if (Input.GetMouseButtonDown(0)){
13.  
14. if (Physics.Raycast (ray, hit , Mathf.Infinity)){
15.  
16. if (hit.collider.name == "ViewScreen") { Application.LoadLevel(MovieTestScene); }
17.  
18. } } }

So the Console error points to line 10 which is:

var ray = Camera.main.ScreenPointToRay ...

What do I need to change in here to reference the Camera of the OVRPlayerController, I tried changing "Camera" and "main" to OVRPlayerController and OVR CameraRig but that didn't fix it