diff --git a/GeneratorFunction.md b/GeneratorFunction.md
new file mode 100644
index 0000000..342080e
--- /dev/null
+++ b/GeneratorFunction.md
@@ -0,0 +1,12 @@
+## GeneratorFunction
+
+```js
+var a = new GeneratorFunction(function(_yield) {
+    _yield("a");
+    _yield("b");
+    _yield("c");
+});
+console.log(a.next().value);
+console.log(a.next().value);
+console.log(a.next().value);
+```
\ No newline at end of file