Arduino control lamp with app

int light = 8;

void setup()
{
  pinMode(light, OUTPUT);
  Serial.begin(9600);
  while (!Serial);
}

void loop() {
  if (Serial.available())
  {
    int state = Serial.parseInt();
    if (state == 1)
    {
      digitalWrite(light, HIGH);
      Serial.println("ON");
    }
    if (state == 2)
    {
      digitalWrite(light, LOW);
      Serial.println("OFF");

    }
  }
}