from machine import Pin # import Pin class
import time # import time module

pinIn = Pin(22, Pin.IN, Pin.PULL_UP) # create pin object from Pin22, set Pin22 to input
pinLED = Pin(28, Pin.OUT) # create pin object from Pin25, set Pin25 to output

while True: # create an infinite loop
    if not pinIn.value(): # if pinIn is pressed
        pinLED.on() # set pinLED turn on
    else: # if pinIn is released
        pinLED.off() # set pinLED turn off
    time.sleep(0.1) # sleep 0.5 second