Fan npn control with led temp meter

#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import commands
import RPi.GPIO as GPIO
import time
GPIO.setwarnings(False)
GPIO.cleanup()
GPIO.setmode (GPIO.BOARD)
GPIO.setup(33,GPIO.OUT)
GPIO.setup(35,GPIO.OUT)
GPIO.setup(36,GPIO.OUT)
GPIO.setup(37,GPIO.OUT)
GPIO.setup(38,GPIO.OUT)
GPIO.setup(40,GPIO.OUT)
p = GPIO.PWM(33,150)
p.start(0)
n = []
x = 1
while True:
    tempFile = open( "/sys/class/thermal/thermal_zone0/temp" )
    cpu_temp = tempFile.read()
    tempFile.close()
    n = int(cpu_temp)/1000
#   print(n)
    if n < 40:
        p.ChangeDutyCycle(10.0)
        GPIO.output(35,GPIO.HIGH)
        GPIO.output(36,GPIO.LOW)
        GPIO.output(37,GPIO.LOW)
        GPIO.output(38,GPIO.LOW)
        GPIO.output(40,GPIO.LOW)
        time.sleep(3)
    elif n > 40 and n < 45:
        p.ChangeDutyCycle(25.0)
        GPIO.output(35,GPIO.HIGH)
        GPIO.output(36,GPIO.HIGH)
        GPIO.output(37,GPIO.LOW)
        GPIO.output(38,GPIO.LOW)
        GPIO.output(40,GPIO.LOW)
        time.sleep(3)
    elif n > 45 and n < 50:
        p.ChangeDutyCycle(50.0)
        GPIO.output(35,GPIO.HIGH)
        GPIO.output(36,GPIO.HIGH)
        GPIO.output(37,GPIO.HIGH)
        GPIO.output(38,GPIO.LOW)
        GPIO.output(40,GPIO.LOW)
        time.sleep(3)
    elif n > 50 and n < 55:
        p.ChangeDutyCycle(75.0)
        GPIO.output(35,GPIO.HIGH)
        GPIO.output(36,GPIO.HIGH)
        GPIO.output(37,GPIO.HIGH)
        GPIO.output(38,GPIO.HIGH)
        GPIO.output(40,GPIO.LOW)
        time.sleep(3)
    elif n > 55:
        p.ChangeDutyCycle(100.0)
        GPIO.output(35,GPIO.HIGH)
        GPIO.output(36,GPIO.HIGH)
        GPIO.output(37,GPIO.HIGH)
        GPIO.output(38,GPIO.HIGH)
        GPIO.output(40,GPIO.HIGH)
        time.sleep(3)