import time
import machine
#setup led and pushbutton
pb = machine.Pin(10, Pin.IN, Pin.PULL.UP)
led = machine.Pin(15, machine.Pin.OUT)
led_state = 0 
last_button_state = 1
while True:
    button_state = button.value()
    if button state == 1 and last_button_state == 0:
        led_state = not led_state
        led.value(led_state)
        time.sleep(.1)
        last_button_state = button_state
        time.sleep(.1)