refactor

@implementation ViewController

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

    elapsed = 0;
    numOfSpeed = 120;

    UIButton *playBtn = [[UIButton alloc] initWithFrame:CGRectMake(200, 200, 50, 50)];
    [playBtn setTitle:@"Play" forState:UIControlStateNormal];
    playBtn.backgroundColor = UIColor.redColor;
    [playBtn addTarget:self action:@selector(playButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:playBtn];

    UIButton *incrementBtn = [[UIButton alloc] initWithFrame:CGRectMake(250, 200, 50, 50)];
    [incrementBtn setTitle:@"+" forState:UIControlStateNormal];
    incrementBtn.backgroundColor = UIColor.redColor;
    [incrementBtn addTarget:self action:@selector(incrementButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:incrementBtn];

    UIButton *decrementBtn = [[UIButton alloc] initWithFrame:CGRectMake(150, 200, 50, 50)];
    [decrementBtn  setTitle:@"-" forState:UIControlStateNormal];
    decrementBtn.backgroundColor = UIColor.redColor;
    [decrementBtn  addTarget:self action:@selector(decrementButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:decrementBtn ];

    self.label = [[UILabel alloc] initWithFrame:CGRectMake(200, 300, 100, 100)];
    self.label.text = [NSString stringWithFormat:@"%.0f", numOfSpeed];
    self.label.backgroundColor = UIColor.blueColor;
    [self.view addSubview:_label];

    [self configureSwipeRecognizerWithDirection:UISwipeGestureRecognizerDirectionUp];
    [self configureSwipeRecognizerWithDirection:UISwipeGestureRecognizerDirectionDown];
    [self configureSwipeRecognizerWithDirection:UISwipeGestureRecognizerDirectionLeft];
    [self configureSwipeRecognizerWithDirection:UISwipeGestureRecognizerDirectionRight];



}

- (void)configureSwipeRecognizerWithDirection:(UISwipeGestureRecognizerDirection)direction {
    UISwipeGestureRecognizer * recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeToControlTheSpeedOfRhythm:)];
    recognizer.direction = direction;
    recognizer.numberOfTouchesRequired = 1;
    [self.view addGestureRecognizer:recognizer];
}