When app launches, creating red light imageView, and setting up layout

1-RedLight.m

// The application launches.  Then...

// This creates the red light view, sets its initial opacity to 75%, and adds to window.

_redLightView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"RedLight"]] autorelease];
_redLightView.layer.opacity = 0.75;
_redLightView.frame = CGRectMake(0, 170, 235, 417);
_redLightView.backgroundColor = [UIColor clearColor];
[self.window addSubview:_redLightView];

2-Animation.m

/*
 * This is the view animation block that gets executed once the red light view has been added to the window.
 * 
 * It animates for for 2.5 seconds, and once completed displays the categories view.
 *
 * You'll notice I wait 0.25 seconds to call startBlueAnimation; 
 * this allows the red light to begin animating for a small instance before the blue light begins.
 * 
*/

[UIView animateWithDuration:2.5
                      delay: 2.0
                    options: UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionCurveLinear
                 animations:^{
                     [self startRedAnimation];
                     [self performSelector:@selector(startBlueAnimation) withObject:nil afterDelay:0.25];
                }
                completion:^(BOOL finished){
                     if (finished == YES) {
                         [self displayCategories];
                     }
                }];

3-startRedAnimation.m

/*
 * This creates the red animation.  
 * It's an "opacity" animation, rotating the opacity from 0.75 to 0.1
 * with a duration of 0.35 seconds. 
 * 
 * It autoreverses, meaning it goes from 0.75 -> 0.1, and then reverses; 0.1 -> 0.75.
 * Repeat count = 25, meaning it will perform the defined animation 25 times within the duration.
 * If I didn't include autoreverse, it would ALWAYS perform 0.75 -> 0.1, 0.75 -> 0.1 (making it look skippy)
 *
*/

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
[animation setFromValue:[NSNumber numberWithFloat:0.75]];
[animation setToValue:[NSNumber numberWithFloat:0.1]];
[animation setDuration:0.35];
[animation setTimingFunction:[CAMediaTimingFunction
                                  functionWithName:kCAMediaTimingFunctionLinear]];
[animation setAutoreverses:YES];
[animation setRepeatCount:25];
    
[[_redLightView layer] addAnimation:animation forKey:@"opacity"];

4-startBlueAnimation.m

// This creates the blue light view, sets its initial opacity to 75%, and adds to window.

_blueLightView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"BlueLight"]] autorelease];
_blueLightView.layer.opacity = 0.75;
_blueLightView.frame = CGRectMake(100, 170, 235, 417);
_blueLightView.backgroundColor = [UIColor clearColor];
[self.window addSubview:_blueLightView];

/*
 * This creates the blue animation.  
 * It's an "opacity" animation, rotating the opacity from 0.75 to 0.1
 * with a duration of 0.35 seconds. 
 * 
 * It autoreverses, meaning it goes from 0.75 -> 0.1, and then reverses; 0.1 -> 0.75.
 * Repeat count = 25, meaning it will perform the defined animation 25 times within the duration.
 * If I didn't include autoreverse, it would ALWAYS perform 0.75 -> 0.1, 0.75 -> 0.1 (making it look skippy)
 * 
*/

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
[animation setFromValue:[NSNumber numberWithFloat:0.75]];
[animation setToValue:[NSNumber numberWithFloat:0.1]];
[animation setDuration:0.35f];
[animation setTimingFunction:[CAMediaTimingFunction
                                  functionWithName:kCAMediaTimingFunctionLinear]];
[animation setAutoreverses:YES];
[animation setRepeatCount:25];

[[_blueLightView layer] addAnimation:animation forKey:@"opacity"];