from machine import Pin
from time import sleep

Led = Pin(15, Pin.OUT)
Button = Pin(16, Pin.IN)

while True:
    if Button.value() == 0:  # Button is pressed
        Led.on()             # Turn LED on
        while Button.value() == 0:
            pass             # Wait while the button is held down
        Led.off()            # Turn LED off once button is released
    else:
        Led.off()            # Ensure LED is off if button is not pressed