from machine import Pin
import utime

pin_leds = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

leds = [Pin(pin, Pin.OUT) for pin in pin_leds]

kecepatan = 0.08

while True:
    # --- EFEK MAJU: Kiri ke Kanan (LED 1 ke LED 10) ---
    for led in leds:
        led.high()        
        utime.sleep(kecepatan)
        led.low()           
        
    # --- EFEK MUNDUR: Kanan ke Kiri (LED 9 ke LED 2) ---
    for led in reversed(leds[1:-1]):
        led.high()          
        utime.sleep(kecepatan)
        led.low()