import time as t
import machine as m

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

led=m.Pin(0,m.Pin.OUT)
button=m.Pin(28,m.Pin.IN,m.Pin.PULL_UP)

while 1:
    state=button.value()
    if state==0:
        led.value(1)
    elif state==1:
        led.value(0)
    t.sleep(0.1)