How to make a controlled Arduino Robot via Bluetooth by using an Android Device

Can you Please teach me How to make a controlled Arduino Robot via Bluetooth by using an Android Device :D 

 

I found some Application in Play Store about the Bluetooth controller, it is called Bluebots ,a Bluetooth remote control for robot. (see below)

https://play.google.com/store/apps/details?id=blue.bots.free.matt&feature=search_result#?t=W251bGwsMSwxLDEsImJsdWUuYm90cy5mcmVlLm1hdHQiXQ..

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[original story: Let's Make Robots]

Let's Make Robots 25 May 11:40