from machine import Pin
from time import sleep_ms

r_led = Pin(12,Pin.OUT)
y_led = Pin(14,Pin.OUT)
g_led = Pin(27,Pin.OUT)

pins = [2,4,5,18,19,23,22]
for i in pins:
    Pin(i,Pin.OUT,value=1)

def san():
    for i in pins:
        Pin(i,Pin.OUT,value=1)
    Pin(19).value(1)
    Pin(23).value(1)

def er():
    for i in pins:
        Pin(i,Pin.OUT,value=0)
    Pin(5).value(1)
    Pin(23).value(1)

def yi():
    for i in pins:
        Pin(i,Pin.OUT,value=1)
    Pin(5).value(0)
    Pin(4).value(0)

def lv():
    g_led.on()
    sleep_ms(500)
    g_led.off()
    sleep_ms(500)

def huang():
    y_led.on()
    sleep_ms(500)
    y_led.off()
    sleep_ms(500)

def hong():
    r_led.on()
    sleep_ms(500)
    r_led.off()
    sleep_ms(500)

while 1:
    san()
    lv()
    er()
    lv()
    yi()
    lv()
    san()
    huang()
    er()
    huang()
    yi()
    huang()
    san()
    hong()
    er()
    hong()
    yi()
    hong()