from machine import Pin, PWM
from utime import sleep_ms
from neopixel import NeoPixel

np = NeoPixel(Pin(22), 16)

def tone(buzzer_pin, freq, time):
    buzzer = PWM(Pin(14), freq=freq, duty=512)
    sleep_ms(time)
    buzzer.deinit()

for i in range(16):
    tone(12, 440, 200)
    np[i] = (255, 0, 0)
    tone(12, 800, 100)
    np.write()
    sleep_ms(100)

    np[i] = (0, 255, 0)
    tone(12, 350, 300)
    np.write()
    sleep_ms(200)

    np[i] = (0, 0, 255)
    tone(12, 230, 600)
    np.write()
    sleep_ms(100)