looking for plugin that can make this animation

Hi, I am looking for a plugin or something that can produce the type on animation on the right on this site:

or

https://www.google.com.au/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiqt-2b8OPXAhUBJpQKHd5dADoQjRwIBw&url=https%3A%2F%2Fpartners.skyscanner.net%2Fnews-case-studies%2Fcase-studies%2Fbuilding-a-facebook-messenger-bot-in-42-days-how-we-did-it-and-why-you-can-too&psig=AOvVaw1wm8YSDvHRsWapnK1O0VI-&ust=1512048083063176

Ideally I would want the animation inside a phone on the header image if that makes sense. Any suggestions would be greatly appreciated!

Thanks in advance.