Warning sound

//Remember to include the pitch.h file


 #include "pitches.h"

// notes in the melody:
int melody[] = {
  NOTE_AS1,NOTE_AS2,NOTE_AS1,NOTE_AS2,NOTE_AS1,NOTE_AS2,NOTE_AS1,NOTE_AS2};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {8,8,8,8,8,8,8,8};

void setup() {
  // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 9; thisNote++) {

    // to calculate the note duration, take one second
    // divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000/noteDurations[thisNote];
    tone(8, melody[thisNote],noteDuration);

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(8);
  }
}

void loop() {
  // no need to repeat the melody.
}