old_contents: '''
  LED
  Turns on and off an on-board LED 
  
  Pluto has collect some number of Arduino boards with on-board LED attached to pin 13. For these boards, Pluto can recognize automatically through the use of the board's class. If unsure, consult the doc at http://arduino.cc and use general Board class, then supply the pin number as the argument to led callable.
  
  This example code is in the public domain.
  
  modified June 22, 2015
  by Joe Chasinga
  '''
  
  #!/usr/bin/env python
  
  import sys, os
  sys.path.append('../pluto')
  
  from pluto import *
  import time
  
  def main():
      board = Board()
      board.led(13).on()
      time.sleep(5)
      board.led(13).off()
  
  if __name__ == '__main__':
      main()
      
  
new_contents: '''
  Blink
  Turns on an on-board LED on for one second, and then off.
  
  Most Arduinos have an on-board LED you can control. On the Uno and Leonardo,
  it is attached to digital pin 13. If you're unsure what pin the on-board LED
  is connected to on your Arduino model, check the doc at http://arduino.cc
  
  This example code is in the public domain.
  
  modified July 12, 2015
  by Joe Chasinga
  '''
  
  #!/usr/bin/env python
  
  import sys, os
  sys.path.append('../pluto')
  
  from pluto import *
  import time
  
  def main():
      # Invoke a general board
      board = Board()
      board.led(13).on()
      time.sleep(1)
      # the board remembers the on-board led
      board.led.off()
  
  if __name__ == '__main__':
      main()
      
  
subject: Add an example