Arduino is a great open-source physical computing platform based on a simple i/o board and a handy development environment that implements the Processing/Wiring language. Download and install the arduino ide.

Simuino is a handy tool that allows you to simulate an Arduino board, so that you can test your Arduino code even if you don't have a physical board.

Write a simple Arduino sketch to blink an LED so that it says FOSSASIA in Morse code. Capture your screen with simuino operating your sketch.

Useful Links -

http://www.arduino.cc/
http://web.simuino.com/
http://en.wikipedia.org/wiki/Morse_code