from machine import PWM, Pin
from utime import sleep_ms

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

while True:
    # buzzer = PWM(Pin(12), freq=440, duty=512)
    # sleep_ms(200)
    # buzzer.freq(800)
    # sleep_ms(100)
    # buzzer.freq(280)
    # sleep_ms(300)
    # buzzer.deinit()
    # sleep_ms(1000)
    tone(12, 520, 200)
    tone(12, 144, 100)
    tone(12, 280, 300)
    tone(12, 992, 253)
    tone(12, 772, 150)
    tone(12, 800, 670)
    tone(12, 821, 640)
    tone(12, 902, 500)
    tone(12, 104, 600)
    sleep_ms(1000)