from machine import Pin
from time import sleep as wait
from random import uniform as randf, randint as rand

leds = [19, 18, 5, 17, 16]
for i in range(len(leds)): leds[i] = Pin(leds[i], Pin. OUT)

for i in range (5):
     for i in leds:
        i.value(1-i.value())
        wait(0.5)