diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..27a080a
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Shafwan Junindra
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights  
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell      
+copies of the Software, and to permit persons to whom the Software is         
+furnished to do so, subject to the following conditions:                      
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.                               
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     
+THE SOFTWARE.
diff --git a/advanced/async_await.dart b/advanced/async_await.dart
new file mode 100644
index 0000000..bbd90c6
--- /dev/null
+++ b/advanced/async_await.dart
@@ -0,0 +1,11 @@
+Future<void> fetchData() async {
+  print("⏳ Mengambil data...");
+  await Future.delayed(Duration(seconds: 2));
+  print("✅ Data berhasil diambil!");
+}
+
+void main() {
+  print("🚀 Start");
+  fetchData();
+  print("🏁 Program selesai (menunggu data...)");
+}
diff --git a/advanced/exception_handling.dart b/advanced/exception_handling.dart
new file mode 100644
index 0000000..05bda8e
--- /dev/null
+++ b/advanced/exception_handling.dart
@@ -0,0 +1,10 @@
+void main() {
+  try {
+    int hasil = 10 ~/ 0; // Error: pembagian nol
+    print("Hasil: $hasil");
+  } catch (e) {
+    print("❌ Terjadi error: $e");
+  } finally {
+    print("🔚 Program tetap jalan meskipun error.");
+  }
+}
diff --git a/advanced/future_example.dart b/advanced/future_example.dart
new file mode 100644
index 0000000..5ebc47c
--- /dev/null
+++ b/advanced/future_example.dart
@@ -0,0 +1,13 @@
+Future<String> getUser() {
+  return Future.delayed(Duration(seconds: 1), () => "Shafwan");
+}
+
+void main() {
+  print("🔍 Mengambil user...");
+
+  getUser().then((user) {
+    print("👤 User: $user");
+  });
+
+  print("🏁 Selesai");
+}
diff --git a/advanced/json_handling.dart b/advanced/json_handling.dart
new file mode 100644
index 0000000..62f9e6f
--- /dev/null
+++ b/advanced/json_handling.dart
@@ -0,0 +1,16 @@
+import 'dart:convert';
+
+void main() {
+  // Dari String ke Map
+  String jsonString = '{"nama": "Shafwan", "umur": 16}';
+  Map<String, dynamic> data = jsonDecode(jsonString);
+  print("👤 Nama: ${data['nama']}, Umur: ${data['umur']}");
+
+  // Dari Map ke String
+  Map<String, dynamic> user = {
+    'username': 'suffjasteb',
+    'level': 'advanced'
+  };
+  String encoded = jsonEncode(user);
+  print("📦 JSON: $encoded");
+}