print("Hello, ESP32!")

#####################################
###### IMPORT LIBRARIES
from machine import Pin, Timer
from time import sleep

#####################################
###### PIN CONFIGURATIONS
# GPIO pin numbers for LED bar (replace with your actual pins if different)
led_bar_pins = [19, 18, 5, 17, 16, 4, 0, 2, 15, 8]

# Create Pin objects for each LED
led_bar = [Pin(pin, Pin.OUT) for pin in led_bar_pins]

#####################################
###### SUBROUTINE FOR LED BAR
def sub_led_bar():
    # Forward direction
    for pin in led_bar:
        pin.on()
        sleep(0.05)
        pin.off()

    # Reverse direction
    for pin in reversed(led_bar):
        pin.on()
        sleep(0.05)
        pin.off()

#####################################
###### TIMER CALLBACK FUNCTION
def timer_callback(timer):
    sub_led_bar()
    sleep(0.5)  # simulate ON time
    for pin in led_bar:
        pin.off()
    sleep(0.5)  # simulate OFF time

#####################################
###### INITIALIZE TIMER (every 2 seconds)
myTimer = Timer(1)
myTimer.init(period=2000, mode=Timer.PERIODIC, callback=timer_callback)

#####################################
###### MAIN ROUTINE
def main():
    while True:
        sleep(10)  # Main loop idle

#####################################
###### EXECUTE MAIN ROUTINE
if __name__ == '__main__':
    main()