new_contents: #!/usr/bin/python
  
  import serial
  import time
  
  ser = serial.Serial('/dev/ttyUSB3', 9600)
  count = 0
  
  while True:
      ser.write('1,2,3,4,5,6\n')
      print ser.readline()
      time.sleep(2)
      count += 1
      if(count > 5):
          break
  
  ser.close()
  
subject: Create serialtest.py