I followed every step in the video but my background doesn't change, what could Have I done wrong? here is my code: //.h file:

import <UIKit/UIKit.h>

@class AHCrystalBall; @interface AHViewController : UIViewController

@property (strong, nonatomic) IBOutlet UILabel *predictionsLabel; @property (strong, nonatomic) AHCrystalBall *crystalBall;

@property (strong, nonatomic) IBOutlet UIImageView *animatedBackground;

-(void) makePrediction; @end

//.m file: // // AHViewController.m // test_crystalBall // // Created by Abdulaziz Alhomaidhi on 6/30/14. // Copyright (c) 2014 FULLUSERNAME. All rights reserved. //

import "AHViewController.h"

import "AHCrystalBall.h"

@interface AHViewController ()

@end

@implementation AHViewController

• (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib.

  self.crystalBall = [[AHCrystalBall alloc]init];

}

• (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; self.animatedBackground.animationImages = [[NSArray alloc]initWithObjects: [UIImage imageNamed:@"CB00001"], [UIImage imageNamed:@"CB00002"], [UIImage imageNamed:@"CB00003"], [UIImage imageNamed:@"CB00004"], [UIImage imageNamed:@"CB00005"], [UIImage imageNamed:@"CB00006"], [UIImage imageNamed:@"CB00007"], [UIImage imageNamed:@"CB00008"], [UIImage imageNamed:@"CB00009"], [UIImage imageNamed:@"CB00010"], [UIImage imageNamed:@"CB00011"], [UIImage imageNamed:@"CB00012"], [UIImage imageNamed:@"CB00013"], [UIImage imageNamed:@"CB00014"], [UIImage imageNamed:@"CB00015"], [UIImage imageNamed:@"CB00016"], [UIImage imageNamed:@"CB00017"], [UIImage imageNamed:@"CB00018"], [UIImage imageNamed:@"CB00019"], [UIImage imageNamed:@"CB00020"], [UIImage imageNamed:@"CB00021"], [UIImage imageNamed:@"CB00022"], [UIImage imageNamed:@"CB00023"], [UIImage imageNamed:@"CB00024"], [UIImage imageNamed:@"CB00025"], [UIImage imageNamed:@"CB00026"], [UIImage imageNamed:@"CB00027"], [UIImage imageNamed:@"CB00028"], [UIImage imageNamed:@"CB00029"], [UIImage imageNamed:@"CB00030"], [UIImage imageNamed:@"CB00031"], [UIImage imageNamed:@"CB00032"], [UIImage imageNamed:@"CB00033"], [UIImage imageNamed:@"CB00034"], [UIImage imageNamed:@"CB00035"], [UIImage imageNamed:@"CB00036"], [UIImage imageNamed:@"CB00037"], [UIImage imageNamed:@"CB00038"], [UIImage imageNamed:@"CB00039"], [UIImage imageNamed:@"CB00040"], [UIImage imageNamed:@"CB00041"], [UIImage imageNamed:@"CB00042"], [UIImage imageNamed:@"CB00043"], [UIImage imageNamed:@"CB00044"], [UIImage imageNamed:@"CB00045"], [UIImage imageNamed:@"CB00046"], [UIImage imageNamed:@"CB00047"], [UIImage imageNamed:@"CB00048"], [UIImage imageNamed:@"CB00049"], [UIImage imageNamed:@"CB00050"], [UIImage imageNamed:@"CB00051"], [UIImage imageNamed:@"CB00052"], [UIImage imageNamed:@"CB00053"], [UIImage imageNamed:@"CB00054"], [UIImage imageNamed:@"CB00055"], [UIImage imageNamed:@"CB00056"], [UIImage imageNamed:@"CB00057"], [UIImage imageNamed:@"CB00058"], [UIImage imageNamed:@"CB00059"], [UIImage imageNamed:@"CB00060"],nil];

  self.animatedBackground.animationDuration = 2.5f; self.animatedBackground.animationRepeatCount = 1; }

-(void) makePrediction { [self.animatedBackground startAnimating]; self.predictionsLabel.text = [self.crystalBall randomPredictions];

}

// Motion/shake methods are here -(void) motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event { self.predictionsLabel.text = nil; }

-(void) motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {

if (motion == UIEventSubtypeMotionShake) {
    [self makePrediction];

}

}

-(void) motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event { NSLog(@"motion cancelled"); }

// Touch methods are here

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { self.predictionsLabel.text = nil; }

-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [self makePrediction]; }

@end