from machine import Pin, PWM
import utime

button_pins = [2, 3, 4]   
buttons = [Pin(pin, Pin.IN, Pin.PULL_UP) for pin in button_pins]

led_pins = [15, 16, 17]  
leds = [Pin(pin, Pin.OUT) for pin in led_pins]


buzzer_pin = 14           
buzzer = PWM(Pin(buzzer_pin))
buzzer.freq(0)           
buzzer.duty(0)            

tones = [262, 330, 392]   

def play_tone(freq):
    buzzer.freq(freq)
    buzzer.duty(512)  

def stop_tone():
    buzzer.duty(0) 

try:
    while True:
        pressed = False
        for i in range(3):
            if buttons[i].value() == 0:  
                leds[i].value(1)         
                play_tone(tones[i])      
                pressed = True
            else:
                leds[i].value(0)        
        if not pressed:
            stop_tone()
        time.sleep(0.05)                 

except KeyboardInterrupt:
    stop_tone()
    for led in leds:
        led.value(0)
    print("Program stopped.")