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:
        led3.on()
        time.sleep_ms(500)
    else:
        led1.off()   
        led2.off()
        led3.off()