         configureHa1cViewGesture()
     }
 
+    // MARK: - configure readings
+
     func configureReadings() {
         // reference TrendsContainerViewController
         let trendsAlgorithmModel = TrendsAlgorithmModel.sharedInstance() as! TrendsAlgorithmModel

        }
    }

    func bloodGlucoseViewTapped(_ sender: UITapGestureRecognizer) {
        performSegue(withIdentifier: SegueIdentifiers.trendsToBloodGlucoseTrend,
                     sender: self)

        performSegue(withIdentifier: SegueIdentifiers.trendsToHa1cTrend,
                     sender: self)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

