from machine import Pin
import time
button1 = Pin(34, Pin. In)
button2 = Pin(35, Pin. In)
button3 = Pin(32, Pin. In)
led1 = Pin(2, Pin.OUT)
led2 = Pin(4, Pin.OUT)
led3 = Pin(16, Pin.OUT)
while True:
    sw1 = button1.value()
    sw2 = button2.value()
    sw3 = button3.value()
    if sw1 == 1 :
        led1 .on()
        time.sleep_ms(500)
        elif sw2 == 1:
            led2.on()
            time.sleep_ms(500)
        elif sw3 == 1:
            led2.on()
            time.sleep_ms(500)
        else :
            led1.off()
            led2.off()
            led3.off()