- (void)drawRect:(CGRect)rect
{
    [super drawRect:rect];

    CGContextRef context = UIGraphicsGetCurrentContext();

    UIGraphicsPushContext(context);

    [self.fillColor set];

    CGRect valueRect = CGRectMake(0, 0, self.frame.size.width * _value, self.frame.size.height);

    UIRectFill(valueRect);

    CGContextSetBlendMode(context, kCGBlendModeScreen);

    [self.highlightColor set];
    UIRectFrame(valueRect);

    UIGraphicsPopContext();
}




- (IBAction) tap:(UITapGestureRecognizer*)sender
{
    if([sender state] == UIGestureRecognizerStateEnded)
    {
        [UIView animateWithDuration:1.5
                              delay:0
                            options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionBeginFromCurrentState
                         animations:^{
                             //self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, 100, 100);
                             self.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.5];
                         }
                         completion:^(BOOL finished){NSLog(@"Done");} ];
    }
}