Open Source development - android traffic light

Recently lot of the open source development platform available and going to public. it let us freely developing our own design and product. Specially the smart phone application become popular. more and more product without smartphone apps definitely less competition.
This project main purpose is introduce you and encourage you guys the new maker era is coming. For example like Arduino, 123D design and App Inventor 2. Now you can also made your own product, for which before this is necessary a team of engineers to manage and handle. Now, you are capable to realise your dream alone.
This product help me recall my memory and exercise my rusting 3D and arduino technique. You can use this for the kids playing game or use this as a very funny decorate on your desk. Just simple print it by 3D printer, program it to your Arduino UNO and simple wiring to connect LED and HC-06 BT dongle. Finally registered on google to get the App Inventor 2. All you need is free and get it instantly from