import MCP3202,wiringpi,time,os		# import library WiringPi-Python
from time import sleep                  # import library sleep

wiringpi.wiringPiSetup()		# Must be called before using IO Function
wiringpi.softPwmCreate(24,0,100)	# Set PWM on pin 24, start value 0, max value 100

def translate(value,leftMin,leftMax,rightMin,rightMax):
	# Figure out how 'wide' each range is
	leftSpan = leftMax - leftMin
	rightSpan = rightMax - rightMin
	# Convert the left range into a 0-1 range (float)
	valueScaled = float(value - leftMin) / float(leftSpan)
	# Convert the 0-1 range into a value in the right range.
	return rightMin + (valueScaled * rightSpan)

try:	
	while True :					# endless loop
		os.system('clear')
		value1= MCP3202.readADC(1)		# range data 0 - vref (volt)
		map=translate(value1,0,4095,100,0)
		print "Ambient Light Monitoring"
		print "Curent Light : ",int(map),"%"
		print ""
		print "Press CTRL+C to exit"
		wiringpi.softPwmWrite(24,int(map))	# PWM pulse on pin 24
		sleep(0.02)                    		# delay for 20ms
		wiringpi.softPwmWrite(24,int(map))	# PWM pulse on pin 24
		sleep(0.02)                    		# delay for 20ms

except KeyboardInterrupt:
	wiringpi.softPwmWrite(24,0)			# PWM pulse on pin 24
	print "exit"

import MCP3202, wiringpi, time, os # import library WiringPi-Python
from time import sleep # import library sleep

wiringpi.wiringPiSetup() # Must be called before using I/O Function
wiringpi.softPwmCreate(24, 0, 100) # Set PWM on pin 24, start value 0, max value 100

def translate(value, leftMin, leftMax, rightMin, rightMax):
	# Figure out how 'wide' each range is
	leftSpan = leftMax - leftMin
	rightSpan = rightMax - rightMin
	# Convert the left range into a 0-1 range (float)
	valueScaled = float(value - leftMin) / float(leftSpan)
	# Convert the 0-1 range into a value in the right range.
	return rightMin + (valueScaled * rightSpan)

try:	
	while True :					# endless loop
		os.system('clear')
		value1= MCP3202.readADC(1)		# range data 0 - vref (volt)
		map=translate(value1,0,4095,100,0)
		print "Ambient Light Monitoring"
		print "Curent Light : ",int(map),"%"
		print ""
		print "Press CTRL+C to exit"
		wiringpi.softPwmWrite(24,int(map))	# PWM pulse on pin 24
		sleep(0.02)                    		# delay for 20ms
		wiringpi.softPwmWrite(24,int(map))	# PWM pulse on pin 24
		sleep(0.02)                    		# delay for 20ms

except KeyboardInterrupt:
	wiringpi.softPwmWrite(24,0)			# PWM pulse on pin 24
	print "exit"

Update 05_Ambient_Light_Monitoring.py