from machine import Pin
from time import sleep
import random

pins = [1,2,3,4,5,6,7,8,9,10]
leds = [Pin(pin, Pin.OUT) for pin in pins]

print ("trying LED sequence")


def LED_DOWN(t):

    print ("Going Down!")
    for led in leds:
        led.on()
        sleep(t)
        led.off()

def LED_UP(t):

    print ("Going Up!")
    for led in leds[::-1]:
        led.on()
        sleep(t)
        led.off()

print ("Finished procesing!")


LED_UP(0.1)
LED_DOWN(0.1)