diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.pbxproj b/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.pbxproj
index 25c42a2..73467db 100644
--- a/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.pbxproj	
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.pbxproj	
@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		195B44C11D6955800099EF4E /* AnimatedLabel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 195B44C01D6955800099EF4E /* AnimatedLabel.swift */; };
 		19D8CA1E1D680BC8003F8268 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 19D8CA1D1D680BC8003F8268 /* AppDelegate.swift */; };
 		19D8CA201D680BC8003F8268 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 19D8CA1F1D680BC8003F8268 /* ViewController.swift */; };
 		19D8CA231D680BC8003F8268 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 19D8CA211D680BC8003F8268 /* Main.storyboard */; };
@@ -34,6 +35,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		195B44C01D6955800099EF4E /* AnimatedLabel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AnimatedLabel.swift; sourceTree = "<group>"; };
 		19D8CA1A1D680BC8003F8268 /* Project 50 - GradientAnimation.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Project 50 - GradientAnimation.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		19D8CA1D1D680BC8003F8268 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		19D8CA1F1D680BC8003F8268 /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
@@ -100,6 +102,7 @@
 				19D8CA1D1D680BC8003F8268 /* AppDelegate.swift */,
 				19D8CA1F1D680BC8003F8268 /* ViewController.swift */,
 				19D8CA211D680BC8003F8268 /* Main.storyboard */,
+				195B44C01D6955800099EF4E /* AnimatedLabel.swift */,
 				19D8CA241D680BC8003F8268 /* Assets.xcassets */,
 				19D8CA261D680BC8003F8268 /* LaunchScreen.storyboard */,
 				19D8CA291D680BC8003F8268 /* Info.plist */,
@@ -256,6 +259,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				195B44C11D6955800099EF4E /* AnimatedLabel.swift in Sources */,
 				19D8CA201D680BC8003F8268 /* ViewController.swift in Sources */,
 				19D8CA1E1D680BC8003F8268 /* AppDelegate.swift in Sources */,
 			);
@@ -484,6 +488,7 @@
 				19D8CA441D680BC8003F8268 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		19D8CA451D680BC8003F8268 /* Build configuration list for PBXNativeTarget "Project 50 - GradientAnimationTests" */ = {
 			isa = XCConfigurationList;
@@ -492,6 +497,7 @@
 				19D8CA471D680BC8003F8268 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		19D8CA481D680BC8003F8268 /* Build configuration list for PBXNativeTarget "Project 50 - GradientAnimationUITests" */ = {
 			isa = XCConfigurationList;
@@ -500,6 +506,7 @@
 				19D8CA4A1D680BC8003F8268 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.xcworkspace/xcuserdata/chenjiong.xcuserdatad/UserInterfaceState.xcuserstate b/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.xcworkspace/xcuserdata/chenjiong.xcuserdatad/UserInterfaceState.xcuserstate
index cb6239a..fcd6b5a 100644
Binary files a/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.xcworkspace/xcuserdata/chenjiong.xcuserdatad/UserInterfaceState.xcuserstate and b/Project 50 - GradientAnimation/Project 50 - GradientAnimation.xcodeproj/project.xcworkspace/xcuserdata/chenjiong.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/AnimatedLabel.swift b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/AnimatedLabel.swift
new file mode 100644
index 0000000..74db178
--- /dev/null
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/AnimatedLabel.swift	
@@ -0,0 +1,10 @@
+//
+//  AnimatedLabel.swift
+//  Project 50 - GradientAnimation
+//
+//  Created by 陈炯 on 16/8/21.
+//  Copyright © 2016年 Jiong. All rights reserved.
+//
+
+import UIKit
+
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/AppIcon.appiconset/Contents.json b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/AppIcon.appiconset/Contents.json
index 36d2c80..eeea76c 100644
--- a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/AppIcon.appiconset/Contents.json	
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/AppIcon.appiconset/Contents.json	
@@ -59,6 +59,11 @@
       "idiom" : "ipad",
       "size" : "76x76",
       "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
     }
   ],
   "info" : {
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/Contents.json b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/Contents.json
new file mode 100644
index 0000000..da4a164
--- /dev/null
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/Contents.json	
@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
\ No newline at end of file
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/Contents.json b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/Contents.json
new file mode 100644
index 0000000..42ccccc
--- /dev/null
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/Contents.json	
@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "background.pdf",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
\ No newline at end of file
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/background.pdf b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/background.pdf
new file mode 100644
index 0000000..e310057
Binary files /dev/null and b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Assets.xcassets/background.imageset/background.pdf differ
diff --git a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Base.lproj/Main.storyboard b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Base.lproj/Main.storyboard
index 3a2a49b..533e2cd 100644
--- a/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Base.lproj/Main.storyboard	
+++ b/Project 50 - GradientAnimation/Project 50 - GradientAnimation/Base.lproj/Main.storyboard	
@@ -1,25 +1,54 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9531" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="OSK-Ge-l93">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
-        <scene sceneID="tne-QT-ifu">
+        <scene sceneID="esT-Nt-JaD">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="OSK-Ge-l93" customClass="ViewController" customModule="Project_50___GradientAnimation" customModuleProvider="target" sceneMemberID="viewController">
                     <layoutGuides>
-                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
-                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                        <viewControllerLayoutGuide type="top" id="0WB-ml-Wb9"/>
+                        <viewControllerLayoutGuide type="bottom" id="yTP-TK-RP8"/>
                     </layoutGuides>
-                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                    <view key="view" contentMode="scaleToFill" id="zvi-MJ-6MQ">
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="background" translatesAutoresizingMaskIntoConstraints="NO" id="Dhk-Uc-jqU">
+                                <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                            </imageView>
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="oHF-hz-6yM" customClass="AnimatedLabel" customModule="Project_50___GradientAnimation" customModuleProvider="target">
+                                <rect key="frame" x="0.0" y="250" width="600" height="100"/>
+                                <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="100" id="Jfh-tP-Ee2"/>
+                                    <constraint firstAttribute="width" constant="600" id="TXj-UL-zG9"/>
+                                </constraints>
+                                <userDefinedRuntimeAttributes>
+                                    <userDefinedRuntimeAttribute type="string" keyPath="text" value="Learn Swift"/>
+                                </userDefinedRuntimeAttributes>
+                            </view>
+                        </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <constraints>
+                            <constraint firstAttribute="trailing" secondItem="Dhk-Uc-jqU" secondAttribute="trailing" id="3gZ-hn-8o6"/>
+                            <constraint firstItem="yTP-TK-RP8" firstAttribute="top" secondItem="Dhk-Uc-jqU" secondAttribute="bottom" id="KAZ-39-pPu"/>
+                            <constraint firstItem="Dhk-Uc-jqU" firstAttribute="leading" secondItem="zvi-MJ-6MQ" secondAttribute="leading" id="Lko-zz-7JC"/>
+                            <constraint firstItem="oHF-hz-6yM" firstAttribute="centerX" secondItem="zvi-MJ-6MQ" secondAttribute="centerX" id="NvG-8f-7oT"/>
+                            <constraint firstItem="Dhk-Uc-jqU" firstAttribute="top" secondItem="0WB-ml-Wb9" secondAttribute="bottom" constant="-20" id="UIR-ce-Jjg"/>
+                            <constraint firstItem="oHF-hz-6yM" firstAttribute="centerY" secondItem="zvi-MJ-6MQ" secondAttribute="centerY" id="iLt-Nx-jqF"/>
+                        </constraints>
                     </view>
                 </viewController>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="mNY-0I-N65" sceneMemberID="firstResponder"/>
             </objects>
+            <point key="canvasLocation" x="306" y="317"/>
         </scene>
     </scenes>
+    <resources>
+        <image name="background" width="1200" height="1200"/>
+    </resources>
 </document>