text: #!/usr/bin/env python
  import time
  from PIL import ImageOps
  # from PIL import ImageGrab
  import pyscreenshot as ImageGrab
  from datetime import datetime
  import os
  # from numpy import *
  #build instructions
  # sudo apt-get install python-imaging
  # easy_install pyscreenshot
  
  i = 0
  
  while(1):
  	time_date_str =  str(datetime.now())
  	time_date_str = time_date_str.split(" ")
  	date = str(time_date_str[0])
  	time_t = str(time_date_str[1][:-7])
  	im = ImageOps.grayscale(ImageGrab.grab())
  	# im.show()
  	folder_name = './'+date
  	if not os.path.exists(folder_name):
  		os.mkdir(folder_name)
  	os.chdir(folder_name)	
  	#this part is for adding which part of day
  	parts_of_day = time_t.split(':')
  
  	if(int(parts_of_day[0])>=00 and int(parts_of_day[00])<=11):
  		sub_folder_name = '00-12'
  	else:
  		sub_folder_name = '12-00'
  
  	sub_folder_path = './'+sub_folder_name
  
  	if not os.path.exists(sub_folder_path):
  		os.mkdir(sub_folder_path)
  	os.chdir(sub_folder_path)
  	file_name = time_t+'.jpg'
  	im.save(file_name, quality=25)
  	# os.system('cd .. > /dev/null 2>&1')
  	# os.system('cd .. > /dev/null 2>&1')
  	abc =  os.getcwd()
  	# print abc
  	abc = abc.rpartition('/')[0]
  	abc = abc.rpartition('/')[0]
  	# print abc
  	os.chdir(abc)
  	# print '***'
  	time.sleep(5)
  	#print datetime.now()
  	#print i 
  	#i=i+1
  