from time import sleep
sleep(0.1) 
from machine import Pin
ledikiPins = [16,17,18,19]
button = Pin(15, Pin.IN, Pin.PULL_DOWN)
leds = []
for i in range(len(ledikiPins)):
  leds.append(Pin(ledikiPins[i], Pin.OUT))
while True:
    b_state = button.value()
    if b_state:
        for led in leds:
            led.on()
            sleep(0.5)
        for led in leds:
            led.off()
        sleep(1)