diff --git a/examples/hello-world.js b/examples/hello-world.js
new file mode 100644
index 0000000..c6786f7
--- /dev/null
+++ b/examples/hello-world.js
@@ -0,0 +1,9 @@
+
+var koa = require('..');
+var app = koa();
+
+app.use(function *(){
+  this.body = 'Hello World';
+});
+
+app.listen(3000);