new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # blink_led.py
  # author: Kentaro Wada <www.kentaro.wada@gmail.com>
  
  import rospy
  
  from RPi import GPIO
  
  
  class BlinkLED(object):
      def __init__(self, pin):
          GPIO.setmode(GPIO.BCM)
          GPIO.setup(pin, GPIO.OUT)
  
      def blink(self):
          GPIO.output(pin, GPIO.HIGH)
  
  
  if __name__ == '__main__':
      PIN_CTRL = 17
      bl = BlinkLED(PIN_CTRL)
      bl.blink()
subject: add blink_led