My new Arduino Ping robot

Hi all I wish to share a new instructables If you like it please vote, thanks so much.

http://www.instructables.com/id/My-Arduino-Ping-Display-Robot/

http://www.youtube.com/watch?v=Mc1A-5bHbJQ

http://www.youtube.com/watch?v=wDNRxYpUi4A&feature=related