new_contents: import time
  from threading
  import os
  
  def startprgm(i):
      print "Running thread %d" % i
      if (i == 0):
          time.sleep(1)
          print('Executing: shutdown.py')
          os.system("sudo python /home/pi/RasPi-Rattle/shutdown.py")
          print('Running: shutdown.py')
      elif (i == 1):
          print('Executing: raspi-rattle.py')
          time.sleep(1)
          os.system("sudo python /home/pi/RasPi-Rattle/raspi-rattle.py")
          print('Running: raspi-rattle.py')
      else:
          pass
  
  for i in range(2):
      t = threasding.Thread(target=startprgm, args=(i,))
      t.start()
  
subject: Create startup.py