Update README.md

Author: thk2b

README.md

@@ -2,6 +2,8 @@
 
 Autoscroll a react component
 
+[live demo](https://codesandbox.io/s/0315qvkx20)
+
 [![npm version](https://badge.fury.io/js/autoscroll-react.svg)](https://badge.fury.io/js/autoscroll-react)
 [![Open Source Love](https://badges.frapsoft.com/os/mit/mit.svg?v=102)](https://github.com/ellerbrock/open-source-badge/)