#define sw1 2
#define sw2 3
#define sw3 4
#define LED1 LED_BUILTIN //is pin 13
#define LED2 12
#define LED3 11
#define LED4 10

void setup(){
  //put your setup code here to run code:
  pinMode(sw1, INPUT_PULLUP);
  pinMode(sw2, INPUT_PULLUP);
  pinMode(sw3, INPUT_PULLUP);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
}


void loop(){
  //put your main code here to run repeatedly:
  int swData = digitalRead(sw1);
  if (swData == 0) { //if switch pressed it's connected to the GND
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
  }else{
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
  }

  int sw2Data = digitalRead(sw2);
  if (sw2Data == 0) { //if switch pressed it's connected to the GND
    digitalWrite(LED3, HIGH);
    delay(250);
    digitalWrite(LED3, LOW);
    delay(250);
  }

  int sw3Data = digitalRead(sw3);
  if (sw3Data == 0) { //if switch pressed it's connected to the GND
    digitalWrite(LED4, HIGH);
    delay(250);
    digitalWrite(LED4, LOW);
    delay(250);
  }
}