Search wiring.org.co:

This example is for Wiring version 1.0 build 0100+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.

Melody by Tom Igoe
Plays a melody circuit: 8-ohm speaker on digital pin 8

    // notes in the melody:
    int melody[] =
    {
      NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
    };

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

    void setup()
    {
      // iterate over the notes of the melody:
      for (int thisNote = 0; thisNote < 8; 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.
    }