diff --git a/JDRealHeatMap.xcodeproj/project.xcworkspace/xcuserdata/JamesDouble.xcuserdatad/UserInterfaceState.xcuserstate b/JDRealHeatMap.xcodeproj/project.xcworkspace/xcuserdata/JamesDouble.xcuserdatad/UserInterfaceState.xcuserstate
index 6b620a5..4511396 100644
Binary files a/JDRealHeatMap.xcodeproj/project.xcworkspace/xcuserdata/JamesDouble.xcuserdatad/UserInterfaceState.xcuserstate and b/JDRealHeatMap.xcodeproj/project.xcworkspace/xcuserdata/JamesDouble.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/JDRealHeatMap/JDSwiftHeatMap.zip b/JDRealHeatMap/JDSwiftHeatMap.zip
new file mode 100644
index 0000000..b87ca1e
Binary files /dev/null and b/JDRealHeatMap/JDSwiftHeatMap.zip differ
diff --git a/JDRealHeatMap/ViewController.swift b/JDRealHeatMap/ViewController.swift
index cec1978..77c6f5e 100644
--- a/JDRealHeatMap/ViewController.swift
+++ b/JDRealHeatMap/ViewController.swift
@@ -46,7 +46,7 @@ class ViewController: UIViewController {
     
     func addRandomData()
     {
-        for i in 0..<20
+        for _ in 0..<20
         {
             let loti:Double = Double(119) + Double(Float(arc4random()) / Float(UINT32_MAX))
             let lati:Double = Double(25 + arc4random_uniform(4)) + 2 * Double(Float(arc4random()) / Float(UINT32_MAX))