What will be the output behavior of this Python code controlling two LEDs on GPIO pins 18 and 23?

What will be the output behavior of this Python code controlling two LEDs on GPIO pins 18 and 23?

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)
GPIO.setup(23, GPIO.OUT)
GPIO.output(18, GPIO.HIGH)
time.sleep(1)
GPIO.output(23, GPIO.HIGH)
time.sleep(1)
GPIO.output(18, GPIO.LOW)
time.sleep(1)
GPIO.output(23, GPIO.LOW)