from machine import Pin, PWM
from utime import sleep_ms

def tone(buzzer, freq, time):
    beep = PWM(Pin(buzzer), freq=freq, duty=512)
    sleep_ms(time)
    beep.deinit()

led = Pin(25, Pin.OUT)
button = Pin(21, Pin.IN)
while True:
    if button.value():
        led.on()
        tone(26,550,500)
    else:
        led.off()