const int buttonPin1 = 2;
const int buttonPin2 = 3;
const int buttonPin3 = 4;
const int buttonPin4 = 5;

const int ledPin1 = 13;
const int ledPin2 = 12;
const int ledPin3 = 11; 
const int ledPin4 = 10;

int buttonState1 = 0;
int buttonState2 = 0;
int buttonState3 = 0;
int buttonState4 = 0;

void setup(){
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);

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

void loop(){
  buttonState1 = digitalRead(2);
  buttonState2 = digitalRead(3);
  buttonState3 = digitalRead(4);
  buttonState4 = digitalRead(5);

  if(buttonState1 == HIGH){
    //digitalWrite(13, LOW);
    digitalWrite(13, HIGH);
  }

  else if(buttonState2 == HIGH){
    digitalWrite(12, HIGH);
  }

  else if(buttonState3 == HIGH){
    digitalWrite(11, HIGH);
  }

  else if(buttonState4 == HIGH){
    digitalWrite(10, HIGH);
  }
}