Я создал слой с помощью CALayer и анимировал его с помощью CABasicanimation с анимацией поворота и создал две кнопки TouchDown UIB для поворота влево и вправо. У меня возникла проблема, когда слой поворачивается вправо, он возвращается к исходному углу и то же самое с левым вращением

Вот мой код:

-(void)viewDidLoad
{
    //Button 1
    UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    aButton.frame = CGRectMake(0, 0, 145, 145);
    aButton.center = CGPointMake(90, 190);
    aButton.backgroundColor = [UIColor redColor];
    [aButton addTarget:self action:@selector(holdDown) forControlEvents:UIControlEventTouchDown];
    [aButton addTarget:self action:@selector(holdRelease) forControlEvents:UIControlEventTouchUpOutside];
    [aButton addTarget:self action:@selector(holdRelease) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:aButton];

    //Button 2
    UIButton *bButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    bButton.frame = CGRectMake(0, 0, 145, 145);
    bButton.center = CGPointMake(690, 190);
    bButton.backgroundColor = [UIColor redColor];
    [bButton addTarget:self action:@selector(holddDown) forControlEvents:UIControlEventTouchDown];
    [bButton addTarget:self action:@selector(holdReleasee) forControlEvents:UIControlEventTouchUpOutside];
    [bButton addTarget:self action:@selector(holdReleasee) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:bButton];
}

-(void)holddDown{
    animaEQ = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    animaEQ.toValue = [NSNumber numberWithFloat:5];
    animaEQ.removedOnCompletion = NO;
    animaEQ.repeatCount= HUGE_VAL;
    animaEQ.duration = 2.2f;
    [equaMi addAnimation:animaEQ forKey:@"blls"];
}
-(void)holdReleasee{
    [equaMi removeAnimationForKey:@"blls"];
}




- (void)holdDown
{
    animaEQl = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    animaEQl.toValue = [NSNumber numberWithFloat:-5];
    animaEQl.removedOnCompletion = NO;
    animaEQl.repeatCount= HUGE_VAL;
    animaEQl.duration = 2.2f;
    [equaMi addAnimation:animaEQl forKey:@"bls"];
}

- (void)holdRelease
{
    [equaMi removeAnimationForKey:@"bls"];

}

Любая помощь, пожалуйста?

Заранее спасибо