To expand on previous posts on this topic, you can assign variables to the pin numbers as in the following program
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
# su[ress warnings
GPIO.setwarnings(False)
# cleanup
GPIO.cleanup()
#set pins up for output
GPIO.setup(7, GPIO.OUT)
GPIO.setup(11, GPIO.OUT)
GPIO.setup(12, GPIO.OUT)
GPIO.setup(13, GPIO.OUT)
GPIO.setup(15, GPIO.OUT)
GPIO.setup(16, GPIO.OUT)
GPIO.setup(18, GPIO.OUT)
GPIO.setup(22, GPIO.OUT)
#set globals
blue1 = 7
blue2 = 22
red1 = 12
red2 = 11
yellow1 = 15
yellow2 = 13
green1 = 16
green2 = 18
#turn leds on using above variables
GPIO.output(blue1, True)
GPIO.output(blue2, True)
time.sleep(.5)
GPIO.output(red1, True)
GPIO.output(red2, True)
time.sleep(.5)
GPIO.output(green1, True)
GPIO.output(green2, True)
time.sleep(.5)
GPIO.output(yellow1, True)
GPIO.output(yellow2, True)
time.sleep(.5)
#add delay
time.sleep(.5)
#turn leds off using above variables
GPIO.output(blue1, False)
GPIO.output(blue2, False)
GPIO.output(red1, False)
GPIO.output(red2, False)
GPIO.output(green1, False)
GPIO.output(green2, False)
GPIO.output(yellow1, False)
GPIO.output(yellow2, False)
In further enhancements I have also assigned a variable to delay as in
delay = .25
then used
time.sleep(delay)
