Rpi Event and call back function

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(13,GPIO.IN,pull_up_down=GPIO.PUD_UP)
GPIO.setup(5,GPIO.OUT)
def prints(CH) :
    print ('Button 1 Pressed')
try :
    GPIO.add_event_detect(13,GPIO.RISING,callback=prints,bouncetime=300)
    while True :
        GPIO.output(5,1)
        time.sleep(0.2)
        GPIO.output(2,0)
        time.sleep(0.2)
finally :
    GPIO.cleanup()