import time
import board
import digitalio
import pwmio

LED_PINS = (board.GP10, board.GP11, board.GP12, board.GP13)
BUTTON_PINS = (board.GP16, board.GP17)
BUZZER_PIN = board.GP14

leds = []
for pin in LED_PINS:
    led = digitalio.DigitalInOut(pin)
    led.direction = digitalio.Direction.OUTPUT
    leds.append(led)

buttons = []
for pin in BUTTON_PINS:
    btn = digitalio.DigitalInOut(pin)
    btn.direction = digitalio.Direction.INPUT
    btn.pull = digitalio.Pull.DOWN
    buttons.append(btn)

buzzer = pwmio.PWMOut(BUZZER_PIN, duty_cycle=0, frequency=440, variable_frequency=True)

def turn_off_all():
    for led in leds:
        led.value = False
    buzzer.duty_cycle = 0

def wait_for_release(button):
    while button.value:
        time.sleep(0.01)

def execute_blink_sequence():
    print("Task 1.1")
    for _ in range(4):
        for led in leds: 
            led.value = True
        time.sleep(0.5)
        for led in leds: 
            led.value = False
        time.sleep(0.5)
    
    buzzer.duty_cycle = 32768
    time.sleep(1)
    buzzer.duty_cycle = 0

def execute_running_lights():
    print("Task 1.2")
    for _ in range(7):
        for led in leds:
            led.value = True
            time.sleep(0.1)
            led.value = False
            
        for led in leds[-2:0:-1]:
            led.value = True
            time.sleep(0.1)
            led.value = False

while True:
    button_1_pressed = buttons[0].value
    button_2_pressed = buttons[1].value

    if button_1_pressed:        
        time.sleep(0.05)
        if buttons[0].value:
            execute_blink_sequence()
            turn_off_all()
            wait_for_release(buttons[0])
            time.sleep(0.05)
            
    elif button_2_pressed:      
        time.sleep(0.05)
        if buttons[1].value:
            execute_running_lights()
            turn_off_all()
            wait_for_release(buttons[1])
            time.sleep(0.05)
            
    else:
        turn_off_all()
        time.sleep(0.01)