// https://forum.arduino.cc/t/switching-6-output-pins-based-on-input-of-4-other-pins/1418771

void setup() {
  // put your setup code here, to run once:
  pinMode(2, INPUT);
  pinMode(4, INPUT);
  pinMode(7, INPUT);
  pinMode(8, INPUT);
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  digitalWrite(3, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  byte status = digitalRead(2);
  status += digitalRead(4) * 2;
  status += digitalRead(7) * 4;
  status += digitalRead(8) * 8;
  digitalWrite(3, status == 10);
  digitalWrite(5, status == 6);
  digitalWrite(6, status == 14);
  digitalWrite(9, status == 1);
  digitalWrite(10, status == 9);
  digitalWrite(11, status == 5);

  delay(500);
}