import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(25, GPIO.OUT)

p = GPIO.PWM(25, 50)

print("center")
p.start(7.5)
time.sleep(2)
print("45 degree")
p.ChangeDutyCycle(5)
time.sleep(2)
print("The other 45 degree")
p.ChangeDutyCycle(10)
time.sleep(2)
print("Center again")
p.ChangeDutyCycle(7.5)
time.sleep(2)
print("stop")
p.stop()
GPIO.cleanup()

from gpiozero import Servo
from time import sleep

myGPIO=25

myCorrection=0.45
maxPW=(2.0+myCorrection)/1000
minPW=(1.0-myCorrection)/1000

servo = Servo(myGPIO,min_pulse_width=minPW,max_pulse_width=maxPW)

while True:
    servo.value=0
    print("0")
    sleep(10)
    servo.value=0.6
    print("0")
    sleep(10)