const int TILT_PIN = 2;

void setup() {
  Serial.begin(9600);
  pinMode(TILT_PIN, INPUT);
}

void loop() {
  int tilt = digitalRead(TILT_PIN);
  if (tilt == 1)  {
    Serial.println("Is tilted");
  } else {
    Serial.println("Not tilted");
  }
  delay(1000);
}