from machine import Pin
from utime import sleep_ms
b1 = Pin(5, Pin.IN, Pin.PULL_UP)
b2 = Pin(6, Pin.IN, Pin.PULL_UP)
led = Pin(4, Pin.OUT)
while True:
    if b1.value() == 0 and b2.value() == 0:
        led.value(1)
        sleep_ms=100
    else:
        led.value(0)
        sleep_ms=100