add gif to readme github code example

Example 1: how to add gif in github readme

![](http://i.imgur.com/OUkLi.gif)

![](http://i.imgur.com/Ssfp7.gif)

![](http://i.imgur.com/60bts.gif)

Example 2: add gif github readme

![Alt Text](https://media.giphy.com/media/vFKqnCdLPNOKc/giphy.gif)

Example 3: how to add a gif to a readme

![](name-of-giphy.gif)