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extension UIViewController {
	
	func addBlurredEffect(horizontalMargin: CGFloat, verticalMargin: CGFloat) {
		
		// Set screen size to be arbitrary smaller than full screen
		let screenBounds = UIScreen.mainScreen().bounds
		
		let size = CGSize(width: screenBounds.width - horizontalMargin,
			height: screenBounds.height - verticalMargin)
		
		let centerPoint = CGPoint(x: screenBounds.width/2 - (size.width/2),
			y: screenBounds.height/2 - (size.height/2))
		
		view.frame = CGRect(origin: centerPoint, size: size)
		
		// Init blurred view
		let visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .Light))
		visualEffectView.frame = view.bounds
		visualEffectView.autoresizingMask = .FlexibleWidth | .FlexibleHeight
		visualEffectView.setTranslatesAutoresizingMaskIntoConstraints(true)
		
		// Set Shadow properties
		visualEffectView.layer.masksToBounds = false;
		visualEffectView.layer.shadowOffset = CGSizeMake(1, 1)
		visualEffectView.layer.shadowRadius = 10
		visualEffectView.layer.shadowOpacity = 0.6
		
		// Show it
		view.addSubview(visualEffectView)
		view.sendSubviewToBack(visualEffectView)
		
	}
	
}