iPhone animations

[UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.2];
        [btn setFrame:CGRectMake(btn.frame.origin.x, btn.frame.origin.y+40, btn.frame.size.width, btn.frame.size.height)];
        resultText.hidden=FALSE;
        btn.tag=10;
        [UIView commitAnimations];


 //another code
 zoomedLeftLegView_female.transform = CGAffineTransformMakeScale(0.3,0.3);
      
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.5];
        zoomedLeftLegView_female.transform = CGAffineTransformMakeScale(1.0,1.0);
        [UIView commitAnimations];