from machine import Pin
from utime import sleep, ticks_ms, ticks_diff

led = Pin(0, Pin.OUT)   # FIXED PIN
button = Pin(14, Pin.IN, Pin.PULL_UP)  # FIXED

intervals = [0.5, 1, 2]
flag = 0

last_state = 1
last_press_time = 0
debounce = 200  # ms

while True:
    current = button.value()

    # detect press (HIGH → LOW)
    if last_state == 1 and current == 0:
        now = ticks_ms()
        if ticks_diff(now, last_press_time) > debounce:
            flag = (flag + 1) % 3
            print("New interval:", intervals[flag])
            last_press_time = now

    last_state = current

    led.toggle()
    sleep(intervals[flag])