How do I make timers trigger when I enter a specific area?

Code:
void OnStart() 

{

    AddEntityCollideCallback("Player", "NameOfYourArea", "TriggerFunc", true, 1);

}



void TriggerFunc(string &in asParent, string &in asChild, int alState)

{

    AddTimer("", 3.0f, "SoundTimer");

}



void SoundTimer(string &in asTimer)

{

    PlaySoundAtEntity("", "NameOfYourSoundFile.snt", "NameOfTheEntityToCreateTheSoundAt", 0, false);

}



/////////////////////////////////////////

////// From the Engine Scripts:

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void AddEntityCollideCallback(string& asParentName, string& asChildName, string& asFunction, bool abDeleteOnCollide, int alStates);





Calls a function when two entites collide.

Callback syntax: void MyFunc(string &in asParent, string &in asChild, int alState) 



alState: 1 = enter, -1 = leave

asParentName - internal name of main object

asChildName - internal name of object that collides with main object (asterix (*) NOT supported!)

asFunction - function to call

abDeleteOnCollide - determines whether the callback after it was called

alStates - 1 = only enter, -1 = only leave, 0 = both





void AddTimer(string& asName, float afTime, string& asFunction);



Creates a timer which calls a function when it expires.

Callback syntax: void MyFunc(string &in asTimer)



asName - the name of the timer

afTime - time in seconds

asFunction - the function to call





void PlaySoundAtEntity(string& asSoundName, string& asSoundFile, string& asEntity, float afFadeTime, bool abSaveSound);



Creates a sound on an entity.



asSoundName - internal name

asSoundFile - the sound to use + extension .snt

asEntity - the entity to create the sound at, can be “Player”

afFadeTime - time in seconds the sound needs to fade

abSaveSound - determines whether a sound should “remember” its 

state. If true, the sound is never attached to the entity! Also note 

that saving should on be used on looping sounds!