int BUTTON1 = 35; 
int BUTTON2 = 34; 
int BUTTON3 = 12;
int BUTTON4 = 33;
int LED1 = 14;
int LED2 = 27;
int LED3 = 26;
int LED4 = 25;

void setup() {
  pinMode (LED1, OUTPUT);
  pinMode (LED2, OUTPUT);
  pinMode (LED3, OUTPUT);
  pinMode (LED4, OUTPUT);
  pinMode(BUTTON1, INPUT_PULLUP);
  pinMode(BUTTON2, INPUT_PULLUP);
  pinMode(BUTTON3, INPUT_PULLUP);
  pinMode(BUTTON4, INPUT_PULLUP);
}

void loop() {
  // baca button
  int input1 = digitalRead(BUTTON1);
  int input2 = digitalRead(BUTTON2);
  int input3 = digitalRead(BUTTON3);
  int input4 = digitalRead(BUTTON4);

  if (input1 == LOW) {
  digitalWrite(LED1, HIGH);
  }

  else {
    digitalWrite(LED1, LOW);
  }

  if (input2 == LOW) {
  digitalWrite(LED2, HIGH);
  }

  else {
    digitalWrite(LED2, LOW);
  } 

  if (input3 == LOW) {
  digitalWrite(LED3, HIGH);
  }

  else {
    digitalWrite(LED3, LOW);
  }

  if (input4 == LOW) {
  digitalWrite(LED4, HIGH);
  }

  else {
    digitalWrite(LED4, LOW);
  }
}