PL-UndB-01-CODE.ino

int pinB1 = digitalRead(11);
int pinB2 = digitalRead(6);
int pinB3 = digitalRead(3);

if ((pinB1 == 0 && pinB3 == 1) || 
    pinB2 == 1) 
{
  digitalWrite(13, HIGH);
}
else 
{
  digitalWrite(13, LOW);
}