         lineChartDataSet_Layer1.drawCirclesEnabled = false
         lineChartDataSet_Layer1.mode = .CubicBezier
         lineChartDataSet_Layer1.cubicIntensity = bezierIntensity
+        lineChartDataSet_Layer1.setColor(UIColor.darkGrayColor())
         
         /* Customize the appearance of line 2 (middle layer) */
         lineChartDataSet_Layer2.setColor(plotBackgroundColor)

        lineChartDataSet_Layer2.fillAlpha = 1.0
        lineChartDataSet_Layer2.mode = .Stepped
        lineChartDataSet_Layer2.drawCirclesEnabled = false
        
        /* Customize the appearance of line 3 (top layer)*/
        lineChartDataSet_Layer3.setColor(lineColor)
        lineChartDataSet_Layer3.drawCirclesEnabled = false
        lineChartDataSet_Layer3.mode = .CubicBezier
        lineChartDataSet_Layer3.cubicIntensity = bezierIntensity
        
        
        let linesToPlot = [lineChartDataSet_Layer1, lineChartDataSet_Layer2, lineChartDataSet_Layer3]

        print("Stepper was tapped: ")
        print(sender.value)
        
        if sender.value < 0 {
            plusMinusLabel.text = "-"
        } else {
            plusMinusLabel.text = ""
        }
        
        slider.value = Float(stepper.value)
        
        setMorphNumbers(slider.value)
