- (void)animate
{
   [UIView beginAnimations:nil context:NULL];
   [UIView setAnimationDuration:2];
   [UIView setAnimationDelegate:self];
   [UIView setAnimationWillStartSelector:@selector(animationStarted)];
   [UIView setAnimationDidStopSelector:@selector(animationStopped)];
   CGRect newFrame = CGRectMake(boxView.frame.origin.x,
                                boxView.frame.origin.y + 100,
                                boxView.frame.size.width,
                                boxView.frame.size.height);
   [boxView setFrame:newFrame];
   [UIView commitAnimations];
}
