const int S1 = 6, S2 = 7, S3 = 8;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(S1, INPUT);
  pinMode(S2, INPUT);
  pinMode(S3, INPUT);

  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

	digitalWrite(2, (digitalRead(S1)==LOW)&&(digitalRead(S2)==LOW)?HIGH:LOW);

  digitalWrite(3, (digitalRead(S1)==HIGH)&&(digitalRead(S3)==HIGH)?HIGH:LOW);

  digitalWrite(4, (digitalRead(S1)==HIGH)&&(digitalRead(S3)==LOW)?HIGH:LOW);

 	digitalWrite(5, (digitalRead(S1)==LOW)&&(digitalRead(S2)==HIGH)?HIGH:LOW);
 
}