diff --git a/vala/threads/async_ex.vala b/vala/threads/async_ex.vala
new file mode 100644
index 0000000..884b464
--- /dev/null
+++ b/vala/threads/async_ex.vala
@@ -0,0 +1,26 @@
+async void long_operation() {}
+
+async void async_method(int idx, int max, MainLoopKeeper mlk) {
+	for(var i = 0; i < max; ++i) {
+		stdout.puts(@"async$idx:$i\n");
+		yield long_operation();
+	}
+}
+
+public class MainLoopKeeper {
+	MainLoop _loop;
+	public MainLoopKeeper(MainLoop loop) { _loop = loop; }
+	~MainLoopKeeper() { _loop.quit(); }
+}
+
+void start_methods(MainLoop loop) {
+	var mlk = new MainLoopKeeper(loop);
+	async_method.begin(1, 8, mlk);
+	async_method.begin(2, 3, mlk);
+}
+
+void main() {
+	var loop = new MainLoop();
+	start_methods(loop);
+	loop.run();
+}