int val;


void setup() {

  pinMode(15, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);

  pinMode(13, INPUT_PULLUP);
  pinMode(12, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
  pinMode(27, INPUT_PULLUP);

}

void loop() {
//////////////////////////
  val = digitalRead(13);

  if (val == 0) {
    digitalWrite(15, HIGH);
  }
  else {
    digitalWrite(15, LOW);

  }
///////////////////////// sw1

/////////////////////////
  val = digitalRead(12);

  if (val == 0) {
    digitalWrite(4, HIGH);
  }
  else {
    digitalWrite(4, LOW);

  }
///////////////////////// sw2

////////////////////////
  val = digitalRead(14);

  if (val == 0) {
    digitalWrite(5, HIGH);
  }
  else {
    digitalWrite(5, LOW);

  }
///////////////////////// sw3

///////////////////////////
  val = digitalRead(27);

  if (val == 0) {
    digitalWrite(18, HIGH);
  }
  else {
    digitalWrite(18, LOW);

  }
  /////////////////////// sw4
}