With an Arduino one could make one outputpin HIGH for five seconds in setup() when you want a nice "die off"consider digitalWrite(). see http://arduino.cc/en/Tutorial/AnalogInOutSerial, to get started.
With an Arduino one could make one outputpin HIGH for five seconds in setup() when you want a nice "die off"consider digitalWrite(). see http://arduino.cc/en/Tutorial/AnalogInOutSerial, to get started.