from machine import Pin, PWM
from time import sleep

# --- Define the buzzer pin ---
buzzer = PWM(Pin(15))

# --- Define note frequencies (Hz) ---
C = 261
D = 294
E = 329
F = 349
G = 391
A = 440
B = 493
C5 = 523

# --- Define the song (Twinkle Twinkle Little Star) ---
# Format: (note, duration)
song = [
    (C, 0.5), (C, 0.5), (G, 0.5), (G, 0.5),
    (A, 0.5), (A, 0.5), (G, 1.0),
    (F, 0.5), (F, 0.5), (E, 0.5), (E, 0.5),
    (D, 0.5), (D, 0.5), (C, 1.0),

    (G, 0.5), (G, 0.5), (F, 0.5), (F, 0.5),
    (E, 0.5), (E, 0.5), (D, 1.0),
    (G, 0.5), (G, 0.5), (F, 0.5), (F, 0.5),
    (E, 0.5), (E, 0.5), (D, 1.0),

    (C, 0.5), (C, 0.5), (G, 0.5), (G, 0.5),
    (A, 0.5), (A, 0.5), (G, 1.0),
    (F, 0.5), (F, 0.5), (E, 0.5), (E, 0.5),
    (D, 0.5), (D, 0.5), (C, 1.0)
]

# --- Function to play note ---
def play(note, duration):
    if note == 0:  # rest
        buzzer.duty_u16(0)
    else:
        buzzer.freq(note)
        buzzer.duty_u16(30000)
    sleep(duration)
    buzzer.duty_u16(0)
    sleep(0.05)  # short pause between notes

# --- Play the song ---
for note, duration in song:
    play(note, duration)

# --- Turn off buzzer ---
buzzer.deinit()