As long as it's running, it simulates pressing the F16 key every 5 seconds to trick messaging clients into thinking that you're still active.

fake_keypress.py

import win32api, win32com.client
import time, sys

# open a shell to type into
shell = win32com.client.Dispatch("WScript.Shell")

while True:
	# just some dots to show that it's still running
	sys.stdout.write('.')
	sys.stdout.flush()
	
	# press a key
	shell.SendKeys("{F16}")
	
	# be patient, let laziness flow through you
	time.sleep(5)