from machine import Pin
from utime import sleep

#####################################
###### PIN CONFIGURATIONS
# Configure the pin as output
# Replace with your GPIO Pins here
led_bar_pins=[19,18,5,17,16,4,0,2,15,21]
led_bar = [Pin(led_bar_pins[i], Pin.OUT) for i in range(10)] 

#####################################
###### SUBROUTINE FOR RGB LED
def sub_led_bar():
    # for each LED 
    for pin in led_bar:
        # turn ON
        pin.on()
        # wait 0.05 seconds
        sleep(0.05)
        # turn OFF
        pin.off()
    # for each LED (reverse order)
    for pin in reversed(led_bar):
        # turn ON
        pin.on()
        # wait 0.05 seconds
        sleep(0.05)
        # turn OFF
        pin.off()

while True:
    sub_led_bar()