/****************************************************
code obtained using chatgpt by arvind patil date 7 may 2023
/****************************************************
Once you have saved the code to your MicroPython editor, you can transfer it 

to the Pico board using a file transfer protocol such as AMPY.

 Here are the steps to upload the code using AMPY:

    Connect your Pico board to your computer using a USB cable.

    Open a command prompt or terminal window and navigate 
    thhe directory where you saved the traffic_light.py file.

    Use the following command to transfer the file to the Pico board:


ampy --port [PORT] put traffic_light.py

Replace [PORT] with the name of the serial port that your 
Pico board is connected to. You


************************************************************/


import machine
import utime

# Define the pins for each LED
red_pin = machine.Pin(0, machine.Pin.OUT)
yellow_pin = machine.Pin(1, machine.Pin.OUT)
green_pin = machine.Pin(2, machine.Pin.OUT)

# Define functions to turn on each LED
def turn_on_red():
    red_pin.value(1)
    yellow_pin.value(0)
    green_pin.value(0)

def turn_on_yellow():
    red_pin.value(0)
    yellow_pin.value(1)
    green_pin.value(0)

def turn_on_green():
    red_pin.value(0)
    yellow_pin.value(0)
    green_pin.value(1)

# Main loop to cycle through the red, yellow, and green lights
while True:
    turn_on_red()
    utime.sleep(5)
    turn_on_yellow()
    utime.sleep(2)
    turn_on_green()
    utime.sleep(5)
    turn_on_yellow()
    utime.sleep(2)