title: Repeating self performSelector
body: <p>I was just wandering If there is a simplier method to repeat the codes below for 20 seconds. If there is, how?        </p>
  
  <pre><code>[self performSelector:@selector( move1) withObject:nil afterDelay:0.0];
  [self performSelector:@selector( move2) withObject:nil afterDelay:0.2];
  [self performSelector:@selector( move3) withObject:nil afterDelay:0.4];
  [self performSelector:@selector( move1) withObject:nil afterDelay:0.8];
  [self performSelector:@selector( move2) withObject:nil afterDelay:0.10];
  [self performSelector:@selector( move3) withObject:nil afterDelay:0.12];
  </code></pre>