title: Working with CAReplicatorLayer
body: <p>I've been trying to create a cool text effect with the CAReplicatorlayer, CATextLayer and very basic animations. I'm trying to make the letters look like they are being droped from the top of the screen followed by cool replicators which will become less and less visible. I've managed to do this effect but not completely.</p>
  
  <p>So far this is what I've got:</p>
  
  <pre><code>CATextLayer *messageLayer = [CATextLayer layer];
  
  [messageLayer setForegroundColor:[[UIColor blackColor] CGColor]];
  [messageLayer setContentsScale:[[UIScreen mainScreen] scale]];
  [messageLayer setFrame:CGRectMake(0, 0, 40, 40)];
  [messageLayer setString:@"A"];
  
  
  CAReplicatorLayer *replicatorX = [CAReplicatorLayer layer];
  
  //Set the replicator's attributes
  replicatorX.frame = CGRectMake(0, 0, 40, 40);
  replicatorX.anchorPoint = CGPointMake(0,0);
  replicatorX.position = CGPointMake(0, 0);
  replicatorX.instanceCount = 9;
  replicatorX.instanceDelay = 0.15;
  replicatorX.instanceAlphaOffset = -0.1;
  
  replicatorX.zPosition = 200;
  replicatorX.anchorPointZ = -160;
  
  [replicatorX addSublayer:messageLayer];
  
  [self.view.layer addSublayer:replicatorX];
  
  
  messageLayer.position = CGPointMake(40, 400);
  CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position.y"];
  animation.fromValue = [NSNumber numberWithInt:0];;
  animation.toValue = [NSNumber numberWithInt:400];
  animation.duration = 3;
  [messageLayer addAnimation:animation forKey:@"s"];
  </code></pre>
  
  <p>I have two problems:</p>
  
  <ol>
  <li>The replicated layers are starting in the End point.</li>
  <li>When the main layer reach his last animated point the animation stops and the replicated layers can't finish their animation.</li>
  </ol>