from machine import Pin
from utime import sleep

led1_pin = Pin(25, Pin.OUT) 
pb1_pin = Pin(22, Pin.IN)
 

def main():
    while True:
        sub_led1_off() 
        pb1_state = pb1_pin.value()
 
        if pb1_state == 1:
            sub_led1_on() 

def sub_led1_on():
    led1_pin.on()
    sleep(0.5) 
def sub_led1_off():
    led1_pin.off()
    sleep(0.5) 


if __name__ == '__main__':
 main()