from machine import Pin
from utime import sleep

leds_r = [Pin(i, Pin.OUT) for i in range(0,6)] 
leds_g = [Pin(i, Pin.OUT) for i in range(6,12)]
leds_b = [Pin(i, Pin.OUT) for i in range(12,18)] 
delay = 0.2

for i in range(6):
    leds_r[i].on()
    leds_g[i].on()
    leds_b[i].on()

while True:
    for i in range(6):   # r
        leds_g[i].on()
        leds_b[i].on()
        leds_r[i].off()
        sleep(delay)

    for i in range(6):   # g
        leds_r[i].on()
        leds_g[i].off()
        sleep(delay)

    for i in range(6):  # b
        leds_g[i].on()
        leds_b[i].off()
        sleep(delay)

    for i in range(6):  # rg
        leds_b[i].on()
        leds_r[i].off()
        leds_g[i].off()
        sleep(delay)

    for i in range(6):  # rb
        leds_g[i].on()
        leds_b[i].off()
        sleep(delay)
    
    for i in range(6):  # gb
        leds_r[i].on()
        leds_g[i].off()
        sleep(delay)