0from machine import Pin
from time import sleep
# Button LED control
button = Pin(4, Pin.IN, Pin.PULL_UP)  # Internal pull-up
led = Pin(2, Pin.OUT)  # Built-in LED or external
 
while True:
    if not button.value():  # Button pressed
        led.on()
    else:
        led.off()
    sleep(0.05)
    print("Button:", button.value())