from machine import Pin
import time

# Define LED pins
led_pins = [Pin(15, Pin.OUT), Pin(14, Pin.OUT), Pin(13, Pin.OUT)]

while True:
    # Forward direction (left to right)
    for led in led_pins:
        led.value(1)  # Turn ON
        time.sleep(0.8)  # Small delay for effect
        led.value(0)  # Turn OFF