new_contents: import subprocess as sub
  from qhue import Bridge
  
  b = Bridge("192.168.0.99", "username")
  print b.url
  print b.lights[1]()
   
  p = sub.Popen(('sudo', 'tcpdump', '-e', '-i', 'eth0', 'arp', '-l'), stdout=sub.PIPE)
  for line in iter(p.stdout.readline, b''):
    if line.rstrip().find("50:f5:da:ed:55:8f") >= 0:
      print "Found the Dash. " + line.rstrip()
      b.lights[1].state(on=False) 
  
subject: Create dash-listen.py