Crystal Ball extra credit issue

@interface SDViewController : UIViewController
@property (strong, nonatomic) IBOutlet UILabel *predictionLabel;
@property (strong, nonatomic) NSArray *predictions;
@property (strong, nonatomic) IBOutlet UIColor *color;
@property (strong, nonatomic) NSArray *colors;
For the implementation page I have
- (void)viewDidLoad
{
    [super viewDidLoad];

    self.predictions = [[NSArray alloc] initWithObjects:
                       @"It is Certain",
                       @"It is Decidedly So",
                       @"All signs say YES",
                       @"The Stars are not aligned",
                       @"My reply is no",
                       @"It is doubtful",
                       @"Better not tell you now",
                       @"Concentrate and ask again",
                       @"Unable to answer now",
                       @"Maybe, yes", nil];

    self.predictions = [[NSArray alloc] initWithObjects:
                       @"red",
                       @"green",
                       @"blue",nil];


}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)buttonPressed {
    int random = arc4random_uniform(self.predictions.count);
    self.predictionLabel.text = [self.predictions objectAtIndex:random];
    self.color = [self.colors objectAtIndex:random];

}