更新readme

README.md

@@ -3,5 +3,6 @@ a drager with react style and grid layout system
 waitting for first
 
 [预览地址](http://htmlpreview.github.io/?https://github.com/215566435/React-dragger-layout/blob/master/build/index.html)
+![](https://github.com/215566435/React-dragger-layout/blob/master/example/image/%E6%9D%A1%E5%BD%A2.gif)
 
 准备做好了，开源..