void setup()
{
    tone(8, 440);
    delay(100);
    noTone(8);
    delay(900);

    tone(8, 440);
    delay(100);
    noTone(8);
    delay(900);

    tone(8, 440);
    delay(100);
    noTone(8);
    delay(900);

    tone(8, 880);
    delay(1500);
    noTone(8);
}

void loop()
{

}