from machine import Pin
from utime import sleep
B_led = Pin(0,Pin.OUT)
G_led = Pin(1,Pin.OUT)
R_led = Pin(2,Pin.OUT)
button = Pin(3, Pin.IN , Pin.PULL_DOWN)  # Pull-down button
history = 0              # 8-bit history (starts at 0)
pressed = False

def light_system(blue , green , red):
    B_led.value(blue)
    G_led.value(green)
    R_led.value(red)

def main():
    global button
    sleep(3)
    a = button.value()
    light_system(a , a , a)
    button.irq(trigger=machine.Pin.IRQ_FALLING, handler = interrupt)

def interrupt():
    global history
    global pressed
    while True:
        history = history << 1 | button.value()   # Shift in the current reading
        history = history & 0b11111111              # Keep only 8 bits

        # Check if the last 8 samples were all 1s (button held down)
        if history == 0b11111111 and not pressed:
            print("Button pressed")
            pressed = True

        elif history == 0b00000000 and pressed:
            pressed = False

if __name__ == "__main__":
    main()
    interrupt()