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

np= NeoPixel(Pin(23), 16)
def tone(buzzer_pin, freq, time):
    buzzer=PWM(Pin(12),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)