BBC micro:bit
Bitkit - Buzzer & Neopixels

Introduction

There is nothing particularly special about the code needed to use the buzzer or Neopixels. The buzzer is connected to pin 0 and the Neopixels are on pin 1. Knowing that, you can reuse code from other projects to get the effects that you want.

micro:bit circuit

Buzzer

The following code is enough to show that the buzzer works.

from microbit import *
import music

music.play(music.POWER_UP)

Neopixels

Here is some basic code to cycle through some colours with the four Neopixels.

from microbit import *
import neopixel

np = neopixel.NeoPixel(pin1, 4)
# light all neopixels with given colour
def light_all(col):
    for p in range(0, len(np)):
        np[p] = col
    np.show()

red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)
yellow = (255,64,0)
off = (0,0,0)
cols = [red,green,blue,yellow,off]

while True:
    for c in cols:
        light_all(c)
        sleep(1000)
        light_all(off)
        sleep(1000)