import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)

GPIO.setup(3, GPIO.OUT)

While True:
     GPIO.output(3, True)
     time.sleep(1)
     GPIO.output(3,False)
     time.sleep(1)
     GPIO.output(5, True)
     time.sleep(2)
     GPIO.output(5,False)
     time.sleep(2)