new_contents: import asyncio
  
  
  @asyncio.coroutine
  def coro(loop):
      yield from asyncio.sleep(0.5, loop=loop)
      print("Called coro")
  
  
  
  loop = asyncio.get_event_loop()
  
  def cb(arg):
      print("Called", arg)
  
  
  loop.create_task(coro(loop))
  loop.call_soon(cb, 1)
  loop.call_later(0.4, cb, 2)
  loop.call_at(loop.time() + 0.6, cb, 3)
  loop.call_later(0.7, loop.stop)
  
  
  loop.run_forever()
  print("DONE")
  
subject: Add timers example