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jdickinsonarduino:
Automobile_Deterrent:131: error: a function-definition is not allowed here before '{' token
Automobile_Deterrent:138: error: expected }' at end of input Automobile_Deterrent:138: error: expected }' at end of input

You have some bracket errors.
I think that it's easier to see where your brackets are amiss if you adopt "our" convention, each bracket on a line by itself:

 void loop ()
{
  something
  or other
  if (whatever)
  {
    this and that
  }
}

That way they're stacked up like, a little more obvious.

[ I don't see where the problem is right now, because... I don't have access to the IDE right now. ]