from machine import Pin
from time import sleep

R1 = Pin(5, Pin.OUT)
Y1 = Pin(6, Pin.OUT)
G1 = Pin(7, Pin.OUT)

R2 = Pin(8, Pin.OUT)
Y2 = Pin(9, Pin.OUT)
G2 = Pin(10, Pin.OUT)

R3 = Pin(28, Pin.OUT)
Y3 = Pin(27, Pin.OUT)
G3 = Pin(26, Pin.OUT)

R4 = Pin(21, Pin.OUT)
Y4 = Pin(20, Pin.OUT)
G4 = Pin(19, Pin.OUT)

R1.value(1)
R2.value(1)
R3.value(1)
R4.value(1)
sleep(2)

def all_red():
    G1.value(0)
    Y1.value(0)
    R1.value(1)

    G2.value(0)
    Y2.value(0)
    R2.value(1)

    G3.value(0)
    Y3.value(0)
    R3.value(1)

    G4.value(0)
    Y4.value(0)
    R4.value(1)

    sleep(1)

def lamp1():
    all_red()
    R1.value(0)
    G1.value(1)
    sleep(5)
    G1.value(0)
    Y1.value(1)
    sleep(2)
    Y1.value(0)
    R1.value(1)

def lamp2():
    all_red()
    R2.value(0)
    G2.value(1)
    sleep(5)
    G2.value(0)
    Y2.value(1)
    sleep(2)
    Y2.value(0)
    R2.value(1)

def lamp3():
    all_red()
    R3.value(0)
    G3.value(1)
    sleep(5)
    G3.value(0)
    Y3.value(1)
    sleep(2)
    Y3.value(0)
    R3.value(1)

def lamp4():
    all_red()
    R4.value(0)
    G4.value(1)
    sleep(5)
    G4.value(0)
    Y4.value(1)
    sleep(2)
    Y4.value(0)
    R4.value(1)

while True:
    lamp1()
    lamp2()
    lamp3()
    lamp4()