diff --git a/README.md b/README.md
index c2f48acf..4b30f127 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,14 @@ goes to Bruno.
 
 -->
 
+## Acknowledgments:
+
+ * [Apache Commons Code](https://commons.apache.org/proper/commons-codec/)
+ * [Code Parts from Google's Android Samples](https://android.googlesource.com/platform/development/+/master/samples/Vault/src/com/example/android/vault)
+ * [MaterialProgressBar](https://github.com/DreaminginCodeZH/MaterialProgressBar)
+ * [ZXing](https://github.com/zxing/zxing)
+ * [ZXing Android Embedded](https://github.com/journeyapps/zxing-android-embedded)
+
 ## License:
 ```
 Copyright (C) 2017 Jakob Nixdorf <flocke@shadowice.org>
diff --git a/app/build.gradle b/app/build.gradle
index 9489fd7c..ba37d3df 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -37,6 +37,7 @@ dependencies {
     compile 'com.journeyapps:zxing-android-embedded:3.0.3@aar'
     compile 'com.google.zxing:core:3.2.1'
     compile 'commons-codec:commons-codec:1.5'
+    compile 'me.zhanghai.android.materialprogressbar:library:1.4.1'
 
     androidTestCompile 'com.android.support:support-annotations:25.3.1'
     androidTestCompile 'com.android.support.test:runner:0.5'
diff --git a/app/src/main/java/org/shadowice/flocke/andotp/MainActivity.java b/app/src/main/java/org/shadowice/flocke/andotp/MainActivity.java
index 5dafdfd3..68409357 100644
--- a/app/src/main/java/org/shadowice/flocke/andotp/MainActivity.java
+++ b/app/src/main/java/org/shadowice/flocke/andotp/MainActivity.java
@@ -177,10 +177,10 @@ public class MainActivity extends AppCompatActivity {
         {
             @Override
             public void run() {
-                int progress =  (int) (System.currentTimeMillis() / 1000) % 30 ;
+                int progress =  (int) (TOTPHelper.TOTP_DEFAULT_PERIOD - (System.currentTimeMillis() / 1000) % TOTPHelper.TOTP_DEFAULT_PERIOD) ;
                 progressBar.setProgress(progress*100);
 
-                ObjectAnimator animation = ObjectAnimator.ofInt(progressBar, "progress", (progress+1)*100);
+                ObjectAnimator animation = ObjectAnimator.ofInt(progressBar, "progress", (progress-1)*100);
                 animation.setDuration(1000);
                 animation.setInterpolator(new LinearInterpolator());
                 animation.start();
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 1420cd30..55bc0e8c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -26,24 +26,19 @@
                 android:background="?attr/colorPrimary"
                 app:popupTheme="@style/AppTheme.PopupOverlay" />
 
-
-
-            <ProgressBar
-                style="?android:attr/progressBarStyleHorizontal"
-                android:layout_width="fill_parent"
-                android:layout_height="wrap_content"
+            <me.zhanghai.android.materialprogressbar.MaterialProgressBar
                 android:id="@+id/progressBar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_alignBottom="@+id/toolbar"
                 android:max="3000"
                 android:progress="1500"
-                android:layout_alignBottom="@id/toolbar"
-
-                />
-
-            </RelativeLayout>
-
-
-
+                app:mpb_progressStyle="horizontal"
+                app:mpb_useIntrinsicPadding="false"
+                app:mpb_showProgressBackground="false"
+                style="@style/Widget.MaterialProgressBar.ProgressBar.Horizontal.NoPadding" />
 
+        </RelativeLayout>
 
     </android.support.design.widget.AppBarLayout>
 
@@ -55,6 +50,6 @@
         android:layout_height="wrap_content"
         android:layout_gravity="bottom|end"
         android:layout_margin="@dimen/fab_margin"
-        android:src="@drawable/ic_add_white"></android.support.design.widget.FloatingActionButton>
+        android:src="@drawable/ic_add_white" />
 
 </android.support.design.widget.CoordinatorLayout>