# Check the state of button
# Print state of the button
from machine import Pin
from time import sleep
prev_state = False
curr_state = False
counter = 0
_BTN_4 = Pin(4, Pin.IN, Pin.PULL_UP)
while True:
prev_state = curr_state
curr_state = not _BTN_4.value()
if (prev_state == False and curr_state == True):
counter += 1
print(counter)
sleep(0.1)