# import time
# import RPi.GPIO as GPIO
# time.sleep(0.1) # Wait for USB to become ready

# print("Hello, Pi Pico!")
from machine import Pin
from utime import sleep

def TRAFFIC_LED():
    R1.value(1);
    R2.value(1);
    R3.value(1);
    R4.value(1);
    Y1.value(0);
    Y2.value(0);
    Y3.value(0);
    Y4.value(0);
    G1.value(0);
    G2.value(0);
    G3.value(0);
    G4.value(0);
    LANE(R1,Y1,G1);
    LANE(R2,Y2,G2);
    LANE(R3,Y3,G3);
    LANE(R4,Y4,G4);

def LANE(R,Y,G):
    R.value(0)
    Y.value(0)
    sleep(0.5)
    Y.value(0)
    G.value(1)
    sleep(5)
    G.value(0)
    Y.value(1)
    sleep(0.5)
    Y.value(0)
    R.value(1)

R1=Pin(10,Pin.OUT)
Y1=Pin(11,Pin.OUT)
G1=Pin(12,Pin.OUT)

R2=Pin(18,Pin.OUT)
Y2=Pin(19,Pin.OUT)
G2=Pin(20,Pin.OUT)

R3=Pin(22,Pin.OUT)
Y3=Pin(26,Pin.OUT)
G3=Pin(27,Pin.OUT)

R4=Pin(2,Pin.OUT)
Y4=Pin(3,Pin.OUT)
G4=Pin(4,Pin.OUT)

while True:
    TRAFFIC_LED()