         }
     }
 
-    let dotRadius:CGFloat = 9.0
-    let dotMinRadiusNormal:CGFloat = 0.4
+    private let dotRadius:CGFloat = 9.0
+    private let dotMinRadiusNormal:CGFloat = 0.4
     
     public var topDotsY: CGFloat = 0 {
         didSet {

        return shape
    }()

    lazy var outerDotShapeLayer: CAShapeLayer = {
        let shape = CAShapeLayer()
        shape.fillColor = UIColor.white.cgColor
        shape.strokeColor = UIColor.wmf_blue.cgColor

        return shape
    }()

    private lazy var innerDotShapeLayer: CAShapeLayer = {
        let shape = CAShapeLayer()
        shape.fillColor = UIColor.wmf_blue.cgColor
        shape.strokeColor = UIColor.wmf_blue.cgColor
