from servo import Servo
import time 
motor=Servo(pin=22)
while True:
    motor.move(0)
    time.sleep(1)
    motor.move(90)
    time.sleep(1)
    motor.move(180)
    time.sleep(1)
    motor.move(90)
    time.sleep(1)
    motor.move(0)
    time.sleep(1)