diff --git a/assets/autobahn-99109.mp3 b/assets/autobahn-99109.mp3
new file mode 100644
index 0000000..21d71c8
Binary files /dev/null and b/assets/autobahn-99109.mp3 differ
diff --git a/assets/beep.mp3 b/assets/beep.mp3
index cd3a3ec..fdcaa16 100644
Binary files a/assets/beep.mp3 and b/assets/beep.mp3 differ
diff --git a/assets/cool_down.mp3 b/assets/cool_down.mp3
new file mode 100644
index 0000000..fc6504b
Binary files /dev/null and b/assets/cool_down.mp3 differ
diff --git a/assets/finish.mp3 b/assets/finish.mp3
new file mode 100644
index 0000000..de51d68
Binary files /dev/null and b/assets/finish.mp3 differ
diff --git a/assets/go.mp3 b/assets/go.mp3
new file mode 100644
index 0000000..ecaaa16
Binary files /dev/null and b/assets/go.mp3 differ
diff --git a/assets/warmUp.mp3 b/assets/warmUp.mp3
new file mode 100644
index 0000000..68aa61f
Binary files /dev/null and b/assets/warmUp.mp3 differ
diff --git a/assets/workout.mp3 b/assets/workout.mp3
new file mode 100644
index 0000000..db0cabd
Binary files /dev/null and b/assets/workout.mp3 differ
diff --git a/lib/pages/timer_page.dart b/lib/pages/timer_page.dart
index 06cbabc..b46acf6 100644
--- a/lib/pages/timer_page.dart
+++ b/lib/pages/timer_page.dart
@@ -12,11 +12,15 @@ class IntervalTimerPage extends StatefulWidget {
 class _IntervalTimerPageState extends State<IntervalTimerPage> {
   final Duration _warmupDuration = const Duration(seconds: 5);
   final Duration _cooldownDuration = const Duration(seconds: 5);
-  final Duration _highIntensityDuration = const Duration(seconds: 4);
-  final Duration _lowIntensityDuration = const Duration(seconds: 3);
-  late Duration _totalDuration = const Duration(seconds: 35);
+  final Duration _highIntensityDuration = const Duration(seconds: 3);
+  final Duration _lowIntensityDuration = const Duration(seconds: 2);
+  late Duration _totalDuration = const Duration(minutes: 35);
+  final highIntensityPlayer = AudioPlayer();
+  final lowIntensityPlayer = AudioPlayer();
+  final coolDownPlayer = AudioPlayer();
   final int _numHighIntensityBlocks = 4;
   final int _numLowIntensityBlocks = 3;
+
   Timer? _timer;
   int _currentBlock = 0;
   Duration _currentDuration = const Duration();
@@ -36,15 +40,19 @@ class _IntervalTimerPageState extends State<IntervalTimerPage> {
 
   void _startTimer() {
     _isPaused = false;
+    () async {
+      await AudioPlayer().play(UrlSource('assets/go.mp3'));
+    }();
     _timer = Timer.periodic(const Duration(seconds: 1), (_) => _tick());
-  }
-
-  void _pauseTimer() {
-    _isPaused = true;
-    _timer?.cancel();
+    Future.delayed(const Duration(seconds: 1)).then((value) {
+      _playHighIntensityMusic();
+    });
   }
 
   void _resetTimer() {
+    coolDownPlayer.stop();
+    highIntensityPlayer.stop();
+    lowIntensityPlayer.stop();
     _isPaused = true;
     _timer?.cancel();
     _currentBlock = 0;
@@ -53,9 +61,20 @@ class _IntervalTimerPageState extends State<IntervalTimerPage> {
     setState(() {});
   }
 
-  Future<void> _playSoundEffect() async {
-    final player = AudioPlayer();
-    await player.play(UrlSource('assets/beep.mp3'));
+  Future<void> _playHighIntensityMusic() async {
+    await highIntensityPlayer.setReleaseMode(ReleaseMode.loop);
+    await highIntensityPlayer.play(UrlSource('assets/warmUp.mp3'));
+  }
+
+  Future<void> _playLowIntensityMusic() async {
+    await highIntensityPlayer.stop();
+    Future.delayed(const Duration(microseconds: 600)).then((value) async {
+      await lowIntensityPlayer.play(UrlSource('assets/workout.mp3'));
+    });
+  }
+
+  Future<void> _intervalChange() async {
+    await AudioPlayer().play(UrlSource('assets/beep.mp3'));
   }
 
   void _tick() {
@@ -66,27 +85,35 @@ class _IntervalTimerPageState extends State<IntervalTimerPage> {
       _totalDuration = Duration(
         seconds: _totalDuration.inSeconds - 1,
       );
-      if (_currentDuration.inSeconds == 0) {
-        _playSoundEffect();
-      }
-      if (_currentDuration.inSeconds < 0) {
-        if (_currentBlock == 0) {
-          // Start high intensity blocks.
+      if (_currentDuration.inSeconds < 1) {
+        if (_currentBlock < _numHighIntensityBlocks + _numLowIntensityBlocks) {
+          _intervalChange();
+          if (_currentBlock == 0) {
+            _playLowIntensityMusic();
+          }
           _currentBlock++;
-          _currentDuration = _highIntensityDuration;
-        } else if (_currentBlock <= _numHighIntensityBlocks) {
-          // Start low intensity blocks.
+
+          if (_currentBlock % 2 == 1) {
+            _currentDuration = _highIntensityDuration;
+          } else {
+            _currentDuration = _lowIntensityDuration;
+          }
+        } else if (_currentBlock < _numHighIntensityBlocks * 2) {
+          _intervalChange();
           _currentBlock++;
-          _currentDuration = _lowIntensityDuration;
-        } else if (_currentBlock <=
-            _numHighIntensityBlocks + _numLowIntensityBlocks) {
-          // Start high intensity blocks again.
-          _currentBlock++;
-          _currentDuration = _highIntensityDuration;
-        } else {
-          // End workout.
           _currentDuration = _cooldownDuration;
-          _pauseTimer();
+          () async {
+            await lowIntensityPlayer.stop();
+            await coolDownPlayer.play(UrlSource('assets/cool_down.mp3'));
+          }();
+        } else {
+          () async {
+            Future.delayed(const Duration(microseconds: 900))
+                .then((value) async {
+              await AudioPlayer().play(UrlSource('assets/finish.mp3'));
+            });
+          }();
+          _resetTimer();
         }
       }
     });
@@ -108,53 +135,50 @@ class _IntervalTimerPageState extends State<IntervalTimerPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-        appBar: AppBar(
-          title: const Text('Interval Timer'),
-        ),
         body: Center(
             child: Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        Text(
+          _currentBlock == 0
+              ? 'Warm-up'
+              : _currentBlock % 2 == 1
+                  ? 'High Intensity'
+                  : _currentBlock < _numHighIntensityBlocks * 2
+                      ? 'Low Intensity'
+                      : 'Cool-down',
+          style: const TextStyle(fontSize: 32.0),
+        ),
+        const SizedBox(height: 16.0),
+        Text(
+          _formatDuration(_currentDuration),
+          style: const TextStyle(fontSize: 80.0),
+        ),
+        const SizedBox(height: 32.0),
+        Text(
+          'Total: ${_formatTotalDuration(_totalDuration)}',
+          style: const TextStyle(fontSize: 24.0),
+        ),
+        const SizedBox(height: 32.0),
+        Row(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Text(
-              _currentBlock == 0
-                  ? 'Warm-up'
-                  : _currentBlock <= _numHighIntensityBlocks
-                      ? 'High Intensity'
-                      : 'Low Intensity',
-              style: const TextStyle(fontSize: 32.0),
-            ),
-            const SizedBox(height: 16.0),
-            Text(
-              _formatDuration(_currentDuration),
-              style: const TextStyle(fontSize: 80.0),
-            ),
-            const SizedBox(height: 32.0),
-            Text(
-              'Total: ${_formatTotalDuration(_totalDuration)}',
-              style: const TextStyle(fontSize: 24.0),
-            ),
-            const SizedBox(height: 32.0),
-            Row(
-              mainAxisAlignment: MainAxisAlignment.center,
-              children: [
-                IconButton(
-                  icon: Icon(_isPaused
-                      ? Icons.play_arrow_rounded
-                      : Icons.stop_rounded),
-                  iconSize: 48.0,
-                  onPressed: () {
-                    if (_isPaused) {
-                      _startTimer();
-                    } else {
-                      _pauseTimer();
-                      _resetTimer();
-                    }
-                  },
-                ),
-                // ),
-              ],
+            IconButton(
+              icon: Icon(
+                  _isPaused ? Icons.play_arrow_rounded : Icons.stop_rounded),
+              iconSize: 48.0,
+              onPressed: () {
+                if (_isPaused) {
+                  _startTimer();
+                } else {
+                  _resetTimer();
+                }
+              },
             ),
+            // ),
           ],
-        )));
+        ),
+      ],
+    )));
   }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index acbffcf..5eb18b2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -63,6 +63,11 @@ flutter:
   # To add assets to your application, add an assets section, like this:
   assets:
     - beep.mp3
+    - go.mp3
+    - workout.mp3
+    - warmUp.mp3
+    - cool_down.mp3
+    - finish.mp3
   #   - images/a_dot_burr.jpeg
   #   - images/a_dot_ham.jpeg