from machine import Pin
from utime import sleep

# Define pins for LEDs
yellow = Pin(5, Pin.OUT)
red = Pin(6, Pin.OUT)
green = Pin(7, Pin.OUT)

print("Traffic Light Simulation Started!")

while True:
    # Red ON
    red.value(1)
    yellow.value(0)
    green.value(0)
    print("STOP - Red Light")
    sleep(3)

    # Yellow ON
    red.value(0)
    yellow.value(1)
    green.value(0)
    print("READY - Yellow Light")
    sleep(2)

    # Green ON
    red.value(0)
    yellow.value(0)
    green.value(1)
    print("GO - Green Light")
    sleep(3)