text: import time
  
  import numpy as np
  
  from rpi.gpio import setup, cleanup, CkPin
  from rpi.gpio.motors import Servo
  
  
  def main():
      """
      This example moves a servo. It runs with the circuit described on page 184 of the tutorial.
      """
  
      setup()
  
      # create/start servo
      servo = Servo(
          signal_pin=CkPin.GPIO18,
          min_pwm_high_ms=0.5,
          max_pwm_high_ms=2.5,
          pwm_high_offset_ms=0.0,
          min_degree=0.0,
          max_degree=180.0,
          degrees=0.0
      )
  
      servo.start()
  
      # wave the servo back and forth through its full range
      for _ in range(10):
          if servo.get_degrees() == servo.min_degree:
              servo.set_degrees(servo.max_degree)
          else:
              servo.set_degrees(servo.min_degree)
          time.sleep(0.5)
  
      # step it through its range incrementally
      servo.set_degrees(0.0)
      degree_range = np.arange(servo.min_degree, servo.max_degree, 5)
      for degrees in degree_range:
          servo.set_degrees(degrees)
          time.sleep(0.25)
      for degrees in reversed(degree_range):
          servo.set_degrees(degrees)
          time.sleep(0.25)
  
      # clean up
      servo.stop()
      cleanup()
  
  
  if __name__ == '__main__':
      main()
  