old_contents: import time
  import datetime
  import sys
  
  from pingo.parts import serial
  
  DEFAULT_PORT = '/dev/ttyAMA0'  # the mini-UART port on the Raspberry Pi
  
  def main(port=DEFAULT_PORT):
      lcd = serial.LCD16x2(port)
      time.sleep(.5)  # wait for display to boot up
      lcd.clear()
  
      while True:
          lcd.set_cursor(0, 0)
          now = datetime.datetime.now()
          lcd.write(now.strftime('%H:%M:%S.%f')[:10])
          time.sleep(.1)
  
  if __name__ == '__main__':
      main(*sys.argv[1:])
  
new_contents: import time
  import sys
  
  from pingo.parts import serial
  
  DEFAULT_PORT = '/dev/ttyAMA0'  # the mini-UART port on the Raspberry Pi
  
  def main(port=DEFAULT_PORT):
      lcd = serial.LCD16x2(port)
      time.sleep(.5)  # wait for display to boot up
      lcd.clear()
  
      while True:
          lcd.set_cursor(0, 0)
          lcd.write(time.strftime('%H:%M:%S))
          time.sleep(1)
  
  if __name__ == '__main__':
      main(*sys.argv[1:])
  
subject: Update clock.py