int button_1=12;
int button_2=14;

void setup() {
  // put your setup code here, to run once:
  pinMode(button_1, INPUT);
  pinMode(button_2, INPUT);
  Serial.begin(9600);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  int button_1_state=digitalRead(button_1);
  int button_2_state=digitalRead(button_2);

  if (button_1_state == LOW)
  {
    Serial.println("button 1 is pressed");
    delay(200);
  }

   if (button_2_state == HIGH)
  {
    Serial.println("button 2 is pressed");
    delay(200);
  }
}