int P1 = 0;

int P2 = 4;

void setup()
{
  pinMode(P1, INPUT_PULLUP);
  pinMode(P2, INPUT_PULLUP);
    Serial.begin(115200);
}

void loop()
  {
    if(digitalRead(P1)==LOW)
    {
      Serial.println("detected 1");
      delay(700);
      }

        if(digitalRead(P2)==LOW)
    {
      Serial.println("detected 2");
     
      delay(700);
      }
  }