gistfile1.txt

- (UIImage *)getNextImage {
    if (!self.demonstrationImages || [self.demonstrationImages count] == 0)
        return nil;
    
    UIImage *nextImage = [self.demonstrationImageEnumerator nextObject];
    if (nextImage)
        return nextImage;
    
    self.demonstrationImageEnumerator = [self.demonstrationImages objectEnumerator];
    return [self getNextImage];
}