int Led [] = {8,9,10,11};
int input [] = {4,5,6,7};

void setup(){
  for(int i = 0; i <= 3; i++){
    pinMode(Led[i], OUTPUT);
    pinMode(input[i], INPUT_PULLUP);
  }
}

void loop(){
  for(int i = 0; i <= 3; i++){
    int val = digitalRead(input[i]);

    if(val == 0)
    {
      digitalWrite(Led[i], 1);
    }
    else
    {
      digitalWrite(Led[i], 0);
    }
  }
}


//led 1 :

/*int led = 4;
int input = 7;

void setup() {
  
  Serial.begin(9600);
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);
  pinMode(input, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  int val = digitalRead(input);

  if (val == 1) {
    digitalWrite(led, 0);
  } else {
    digitalWrite(led, 1);
  }
}*/