LISTING PROGRAM
import time
import RPi.GPIO as GPIO
import lcddriver
display = lcddriver.lcd()
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
sensor1=36
sensor2=38
sensor3=40
GPIO.setup(15,GPIO.OUT)
GPIO.setup(sensor1,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(sensor2,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(sensor3,GPIO.IN,pull_up_down=GPIO.PUD_DOWN)