from machine import Pin
import time
leds = []

for i in range(15,0,-1):
    leds.append(Pin(i, Pin.OUT))
    
sleep_time = 0.1

LED_sequence = [x for x in range(0,15,1)] + [x for x in range(14,0,-1)]

print(LED_sequence)



LED_values = [1,0]

while 1:
    for i in LED_sequence: 
        print(i)
        for value in LED_values:
            leds[i].value(value) 
            time.sleep(sleep_time)