from machine import Pin, Timer
from time import sleep

g1 = Pin(9, Pin.OUT)
y1 = Pin(5, Pin.OUT)
r1 = Pin(0, Pin.OUT)

g2 = Pin(8, Pin.OUT)
y2 = Pin(3, Pin.OUT)
r2 = Pin(1, Pin.OUT)

g4 = Pin(16, Pin.OUT)
y4 = Pin(17, Pin.OUT)
r4 = Pin(18, Pin.OUT)

g3 = Pin(27, Pin.OUT)
y3 = Pin(26, Pin.OUT)
r3 = Pin(28, Pin.OUT)

while True:

    g1.on()
    r2.on()
    r3.on()
    r4.on()

    sleep(10)

    g1.off()
    r2.off()

    y1.on()
    y2.on()
    sleep(2)
    y1.off()
    y2.off()

    g2.on()
    r1.on()

    sleep(10)

    g2.off()
    r3.off()

    y2.on()
    y3.on()
    sleep(2)
    y2.off()
    y3.off()

    g3.on()
    r2.on()

    sleep(10)

    g3.off()
    r4.off()

    y3.on()
    y4.on()
    sleep(2)
    y3.off()
    y4.off()

    g4.on()
    r3.on()

    sleep(10)

    g4.off()
    r3.off()
    r1.off()

    y4.on()
    y1.on()
    sleep(2)
    y4.off()
    y1.off()