from machine import Pin
import time

button = Pin(0, Pin.IN, Pin.PULL_UP)
led = Pin(2, Pin.OUT)

state = 0
last = 0

while True:
    if button.value() == 0:
        if time.ticks_ms() - last > 300:
            state = not state
            led.value(state)
            last = time.ticks_ms()
    time.sleep(0.01)