Deactivating/activating billboards

[Pandemoneus]

Well, first of all, you made an integer and a string using the same name ("sequence"), that won't work.
Second thing: What is that "t" in your for-loop? The string? It doesn't work like that in Amnesia. First of all, you try to subtract a string from an integer, which would already throw an error. Second thing, "t" must be an integer instead of a string. Third thing is, you will need to use GetLocalVarInt to access it.

And a summarized function instead of all your 14 would probably look like this:
void deactivate(string &in asTimer)
{
SetLightVisible(asTimer, false);
}

and you call that function like that:

for (int i = 1; i <= 14; i++)
{
AddTimer("PointLight_"+i, i, "deactivate"); //this would disable one light each second
}