UIWindow lulz.m

%hook UIWindow
-(void)layoutSubviews {
    %orig;
    [self setClipsToBounds:YES];
    [self.layer setCornerRadius:25.0f];
    CAGradientLayer *gradient = [CAGradientLayer layer];
    CAShapeLayer *shapeLayer = [[CAShapeLayer alloc] init];

    self.layer.cornerRadius = 25.0f;
    self.layer.shadowColor = [UIColor blueColor].CGColor;
    self.layer.shadowRadius = 10.0f;
    self.layer.shadowOpacity = 1.0f;
    self.layer.shadowOffset = CGSizeMake(0, 0);
    self.userInteractionEnabled = false;
    gradient.frame = borderWindow.bounds;
    gradient.colors = @[ (id)[UIColor blueColor].CGColor, (id)[UIColor redColor].CGColor ];
    gradient.startPoint = CGPointMake(0.0, 0.0);
    gradient.endPoint = CGPointMake(1, 1);
    shapeLayer.lineWidth = 4.50f;
    shapeLayer.path = [UIBezierPath bezierPathWithRoundedRect:self.bounds
                                                 cornerRadius:25.0f].CGPath;
    shapeLayer.fillColor = nil;
    shapeLayer.strokeColor = [UIColor blackColor].CGColor;
    shapeLayer.cornerRadius = 25.0f;
    gradient.mask = shapeLayer;
    [borderWindow.layer insertSublayer:gradient atIndex:0];
}

%end