void setup() 
{
  
  Serial.begin(115200);

  pinMode(23, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(2, OUTPUT);
}

void loop() {
  Serial.println("Afisare în binar numarul 12");
  digitalWrite(23, LOW);
  Serial.println("Led is off");
  delay(500);
  digitalWrite(22, LOW);
  Serial.println("Led is off");
  delay(500);
  digitalWrite(21, LOW);
  Serial.println("Led is off");
  delay(500);
  digitalWrite(19, LOW);
  Serial.println("Led is off");
  delay(500);
  digitalWrite(18, HIGH);
  Serial.println("Led is on");
  delay(500);
  digitalWrite(5, HIGH);
  Serial.println("Led is on");
  delay(500);
  digitalWrite(4, LOW);
  Serial.println("Led is off");
  delay(500);
  digitalWrite(2, LOW);
  Serial.println("Led is off");
  delay(500);
}