#define LED 2
#define LED2 4
#define LED3 12
#define LED4 14


void setup() {
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
}

void loop() {
  digitalWrite(LED, HIGH);
  digitalWrite(LED2, HIGH);
    digitalWrite(LED3, HIGH);
  digitalWrite(LED4, HIGH);

  delay(500);
  digitalWrite(LED, LOW);
  digitalWrite(LED2, LOW);
    digitalWrite(LED3, LOW);
  digitalWrite(LED4, LOW);
  delay(500);
}