import time
time.sleep(0.1) # Wait for USB to become ready

from machine import Pin 
button=Pin(16,Pin.IN,Pin.PULL_UP)
led=Pin(27,Pin.OUT)

while True:
    btn_val=button.value()
    print("button is:",btn_val)
    if btn_val==0:
        led.on()
    elif btn_val==1:
        led.off()
    time.sleep(0.01)