diff --git a/README.md b/README.md
index 43110ea..2d3ea3d 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,8 @@
 
 ## Overview
 
+[![Edit leafeon](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/53xwl9120l?fontsize=14)
+
 A simple route
 
 ~~~js