diff --git a/.DS_Store b/.DS_Store
index c69eb02..a1452d6 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/SubmitTransition/Classes/SpinerLayer.swift b/SubmitTransition/Classes/SpinerLayer.swift
index 3aa2562..93ae28f 100644
--- a/SubmitTransition/Classes/SpinerLayer.swift
+++ b/SubmitTransition/Classes/SpinerLayer.swift
@@ -14,9 +14,10 @@ class SpinerLayer: CAShapeLayer {
 
         let radius:CGFloat = (frame.height / 2) * 0.5
         self.frame = CGRect(x: 0, y: 0, width: frame.height, height: frame.height)
+        
         let center = CGPoint(x: frame.height / 2, y: bounds.center.y)
-        let startAngle = 0 - M_PI_2
-        let endAngle = M_PI * 2 - M_PI_2
+        let startAngle = 0 - (Double.pi / 2)
+        let endAngle = Double.pi * 2 - (Double.pi / 2)
         let clockwise: Bool = true
         self.path = UIBezierPath(arcCenter: center, radius: radius, startAngle: CGFloat(startAngle), endAngle: CGFloat(endAngle), clockwise: clockwise).cgPath
 
@@ -36,7 +37,7 @@ class SpinerLayer: CAShapeLayer {
         self.isHidden = false
         let rotate = CABasicAnimation(keyPath: "transform.rotation.z")
         rotate.fromValue = 0
-        rotate.toValue = M_PI * 2
+        rotate.toValue = Double.pi * 2
         rotate.duration = 0.4
         rotate.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
         
diff --git a/SubmitTransition/Classes/TimerEx.swift b/SubmitTransition/Classes/TimerEx.swift
index 7646003..e5e3cc3 100644
--- a/SubmitTransition/Classes/TimerEx.swift
+++ b/SubmitTransition/Classes/TimerEx.swift
@@ -20,4 +20,19 @@ extension Timer {
         CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, .commonModes)
         return timer
     }
+    
+    
+    /*class func schedule(delay delay: NSTimeInterval, handler: NSTimer! -> Void) -> NSTimer {
+     let fireDate = delay + CFAbsoluteTimeGetCurrent()
+     let timer = CFRunLoopTimerCreateWithHandler(kCFAllocatorDefault, fireDate, 0, 0, 0, handler)
+     CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes)
+     return timer
+     }
+     
+     class func schedule(repeatInterval interval: NSTimeInterval, handler: NSTimer! -> Void) -> NSTimer {
+     let fireDate = interval + CFAbsoluteTimeGetCurrent()
+     let timer = CFRunLoopTimerCreateWithHandler(kCFAllocatorDefault, fireDate, interval, 0, 0, handler)
+     CFRunLoopAddTimer(CFRunLoopGetCurrent(), timer, kCFRunLoopCommonModes)
+     return timer
+     }*/
 }
diff --git a/SubmitTransition/Classes/TransitionSubmitButton.swift b/SubmitTransition/Classes/TransitionSubmitButton.swift
index 33e0612..1e9bc39 100644
--- a/SubmitTransition/Classes/TransitionSubmitButton.swift
+++ b/SubmitTransition/Classes/TransitionSubmitButton.swift
@@ -53,7 +53,6 @@ open class TKTransitionSubmitButton : UIButton, UIViewControllerTransitioningDel
             }, completion: { (done) -> Void in
                 self.shrink()
                 Timer.schedule(delay: self.shrinkDuration - 0.25) { timer in
-                    
                     self.spiner.animation()
                 }
         })