import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
PINS = [23, 24, 25]
H = 1
L = 0
O = -1
LEDS = [[L, O, H],
[H, O, L],
[O, L, H],
[L, H, O],
[O, H, L],
[H, L, O]]
def main():
try:
while True:
for led in LEDS:
for idx, pin in enumerate(led):
if pin == O:
GPIO.setup(PINS[idx], GPIO.IN)
else:
GPIO.setup(PINS[idx], GPIO.OUT)
GPIO.output(PINS[idx], pin)
time.sleep(.1)
except KeyboardInterrupt:
pass
finally:
GPIO.cleanup()
if __name__ == '__main__':
main()