Monitoring and self-regulating processor temperature

from gpiozero import CPUTemperature
from time import sleep  #we import the sleep module from the time library
import RPi.GPIO as GPIO #we import the RPi.GPIO library with the name of GPIO
import time

GPIO.setmode(GPIO.BOARD) #we set the pin numbering to the GPIO.BOARD numbering
GPIO.cleanup()
GPIO.setup(8, GPIO.OUT)  #we set the PIN8 as an output pin
GPIO.setup(10, GPIO.OUT) #we set the PIN10 as an output pin
GPIO.setup(12, GPIO.OUT) #we set the PIN12 as an output pin
GPIO.setup(16, GPIO.OUT) #we set the PIN16 as an output pin
GPIO.setup(18, GPIO.OUT) #we set the PIN18 as an output pin
GPIO.setup(22, GPIO.OUT) #we set the PIN22 as an output pin
GPIO.setup(24, GPIO.IN)  #we set the PIN24 as an input pin 

#we will set the pin  numbering to the GPIO.BOARD numbering for ultrasonic
trig = 22
echo = 24
#calculate distance with ultrasonic module
def calculate_dist():
   #set the trigger to HIGH
   GPIO.output(trig, GPIO.HIGH)
   #sleep 0.00001 s and set the trigger to LOW
   time.sleep(0.00001)
   GPIO.output(trig, GPIO.LOW)
   #save the start and  stop times
   start = time.time()
   stop = time.time()
   #modify  the start time to be the last time until the echo  becomes HIGH
   while GPIO.input(echo) == 0:
      start = time.time()
   #modify the stop time to be the last time until the echo becomes LOW
   while GPIO.input(echo) == 1:
      stop = time.time()
   #get the duration of the echo pin as HIGH
   duration = stop - start
   #calculate the distance
   distance = 34300/2 * duration
   if distance < 0.5 and distance > 400:
      return 0
   else:
      return distance

#the next variable stores the pin used to control the speed of the motor
motorspeed_pin = 16

 #the next variable store the pin used to control the direction of the motor
DIRA = 18
GPIO.output(DIRA, GPIO.HIGH) # set the  direction

#the motorspeed_pin will be used as an enable pin on the mootr driver
pwmPIN = GPIO.PWM(motorspeed_pin, 100)

#we start the pwm instance with a duty cycle of 0
pwmPIN.start(0)

counter = 1
try:
   while counter < 500:
      cpu = CPUTemperature()
      print(cpu.temperature)
      if cpu.temperature < 38:
         GPIO.output(10, GPIO.LOW)  #we change the digital output on the 10th pin to a low voltage
                                    #the GREEN LED stops
         GPIO.output(8, GPIO.LOW)   #we change the digital output on the 8th pin to a low voltage
                                    #the RED LED stops
         GPIO.output(12, GPIO.HIGH) #we change the digital output on the 12th pin to a high voltage
                                    #the BLUE LED starts
         pwmPIN.ChangeDutyCycle(0)  #set the speed of the motor to 0 (off)

      if cpu.temperature >= 38 and cpu.temperature < 45:
         GPIO.output(12, GPIO.LOW)  #we change the digital output on the 12th pin to a low voltage
                                    #the BLUE LED stops
         GPIO.output(8, GPIO.LOW)   #we change the digital output on the 8th pin to a low voltage
                                    #the RED LED stops
         GPIO.output(10, GPIO.HIGH) #we change the digital output on the 10th pin to a high voltage 
                                    #the GREEN LED starts
         if calculate_dist() < 15:
            pwmPIN.ChangeDutyCycle(100) #set the speed of the motor to 100 (on)
         else:
            pwmPIN.ChangeDutyCycle(0)   #set the speed of the motor to 0 (off) 
      if cpu.temperature >= 45:
         GPIO.output(12, GPIO.LOW)  #we change the digital output on the 12th pin to a low voltage
                                    #the BLUE LED stops
         GPIO.output(10, GPIO.LOW)  #we change the digital output on the 10th pin to a low voltage
                                    #the GREEN LED stops
         GPIO.output(8, GPIO.HIGH)  #we change the digital output on the 8th pin to a high voltage
                                    #the RED LED starts
         pwmPIN.ChangeDutyCycle(100) #set the maximum speed of the motor
      sleep(1)
      counter+=1
except KeyboardInterrupt:
   pass
GPIO.cleanup()