import time
from machine import Pin

LED_PINS = [0,4,9,15]
On_button = (20, Pin.IN)
Off_button = (28,Pin.IN)

led_state = "OFF"  
blinking = False

def turn_on_leds():
    """Turn on all LEDs."""
    for pin in LED_PINS:

        print(f"{pin} is ON")  
    print("All LEDs are ON")
    global led_state
    led_state = "ON"

def turn_off_leds():
    """Turn off all LEDs."""
    for pin in LED_PINS:
        print(f"{pin} is OFF")  
    print("All LEDs are OFF")
    global led_state
    led_state = "OFF"

def blink_leds():
    """Blink LEDs in sequence."""
    global blinking
    while blinking:
        for pin in LED_PINS:
            print(f"{pin} is ON")  
            time.sleep(0.5) 
            
            print(f"{pin} is OFF")  
            time.sleep(0.5)  

def button_callback():
    """Handle button press events."""
    global led_state, blinking
    if led_state == "OFF":
        turn_on_leds()
    elif led_state == "ON":
        blinking = True
        print("LEDs will now blink in sequence.")
        led_state = "BLINK"
    elif led_state == "BLINK":
        blinking = False
        turn_off_leds()

try:
    print("Press the button to control the LEDs.")
   
    while True:
        button_pressed = False  
        button_callback()
        time.sleep(0.1)

except KeyboardInterrupt:
    print("Program stopped by User")

finally:
    turn_off_leds()