how can i stop animation of a single button from group of buttons

Question

hi i am new to iphone. my code for animating the buttons is as fallows

- (void)moveImage:(UIButton *)image duration:(NSTimeInterval)duration curve:(int)curve x:(CGFloat)x y:(CGFloat)y
{


    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:duration];
    [UIView setAnimationCurve:curve];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationRepeatAutoreverses:YES];
    [UIView setAnimationRepeatCount:50];



    CGAffineTransform transform = CGAffineTransformMakeTranslation(x,y);
    image.transform = transform;
    [UIView commitAnimations];

}

and i am creating a buttons, as fallows and apply animation to them

- (void)drawsecond {

    UIView *view = [[UIView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    int row = 0;
    int column = 0;

    for (int i=6; i<_images.count; i++) {

        buttonimage = [UIButton buttonWithType:UIButtonTypeCustom];

        buttonimage.frame = CGRectMake(column*60+5, row*60+5, 70,70);
        [buttonimage setImage:[UIImage imageNamed:[_images objectAtIndex:i]] forState:UIControlStateNormal];
        buttonimage.tag = i;
        [buttonimage addTarget:self 
                   action:@selector(buttonClicked:) 
         forControlEvents:UIControlEventTouchUpInside];
        buttonimage.tag = i; 

        [view addSubview:buttonimage];

        if (column == 4) {
            column = 0;
            row++;
        } else {
            column++;
        }

            [self moveImage:buttonimage duration:8.0 curve:UIViewAnimationCurveEaseIn x:0.0 y:320];
    }

    self.view = view;
    [ view release];


}

it works fine.Now what i need is i have to stop the animation of the selected button when i click the button.what i have to write for that in button click selector.Please help me.Thank u in advance.