title: Adding time to NSTimer
body: <p>I'm creating an iOS test game as practice and want a game over method to be ran at the end of a 15 second timer.</p>
  
  <p>I also want time to be added to this timer and taken away if certain actions take place.</p>
  
  <p>Not having much luck figuring out how to add time or take away time from a certain timer depending on actions by the user.</p>
  
  <p>So far I have the timer in <code>viewDidLoad</code> and a method with some conditional formatting that will do things depending on what the user does.</p>