from machine import Pin 
import time 
v1=Pin(13,Pin.IN)
l1=Pin(12,Pin.IN)
s1=Pin(14,Pin.IN)
f1=Pin(27,Pin.IN)
led=Pin(26,Pin.OUT)

def fun():
    while True:
        V= v1.value()
        L= l1.value()
        S= s1.value()
        F= f1.value()
        if ( L or V and not S or S and not F):
            led.on()
        else:
            led.off()
fun()