diff --git a/README.md b/README.md
index 9d92c0e..0846f31 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,8 @@
 # type
 A FOSS clone of [typing.io](https://typing.io). You can check it out at [daisukeokaoss/type](https://daisukeokaoss.github.io/type/).
+
+You can effectively read source code by typing github source code.
+
+example is here.
+
+https://daisukeokaoss.github.io/type/type.html#daisukeokaoss/type/master/js/type.js