import RPi.GPIO as GPIO
import time

#GPIO.cleanup()

GPIO.setmode(GPIO.BCM)
BLUE = 23
GREEN = 24
RED = 25
YELLOW = 18

GPIO.setup(YELLOW, GPIO.OUT)
GPIO.setup(RED, GPIO.OUT)
GPIO.setup(GREEN, GPIO.OUT)
GPIO.setup(BLUE, GPIO.OUT)

GPIO.output(RED, 1)
time.sleep(3)
GPIO.output(RED, 0)
GPIO.output(BLUE, 1)
time.sleep(3)
GPIO.output(BLUE, 0)
GPIO.output(GREEN, 1)
time.sleep(3)
GPIO.output(GREEN, 0)
GPIO.output(YELLOW, 1)
time.sleep(3)
GPIO.output(YELLOW, 0)




GPIO.cleanup()