from machine import Pin
from time import sleep

led = Pin(12, Pin.OUT)
button = Pin(26, Pin.IN, Pin.PULL_UP)

# wait for release after boot
while button.value() == 0:
    sleep(0.05)

last_state = 1

while True:
    current = button.value()

    if last_state == 1 and current == 0:
        for _ in range(5):
            led.on()
            sleep(0.3)
            led.off()
            sleep(0.3)

    last_state = current
    sleep(0.05)