new_contents: from piglow import PiGlow
  import time
  
  def brighten_arm( arm ):
  
      for i in range( 1, 10 ):
          piglow.arm( arm, i )
          time.sleep( 0.11 )
  
      time.sleep( 0.5 )
      piglow.arm( arm, 0 )
  
  piglow = PiGlow()
  
  piglow.all(0)
  
  brighten_arm( 1 )
  brighten_arm( 2 )
  brighten_arm( 3 )
  
  
subject: Add simple demo of piglow - lighting arms