/*  Multiple tone player
 Plays multiple tones on multiple pins in sequence:
 * 3 each 8-ohm speakers on digital pins 6, 7, and 8
OR Plays three tones in sequence on single spreaker (pin 9)
 created 8 March 2010; by Tom Igoe
 based on a snippet from Greg Borenstein
This example code is in the public domain.
 http://arduino.cc/en/Tutorial/Tone4
Modified on 25 June 2015 
By Charles Rubenstein for single speaker, three tones
 */

void setup( ) {
}

void loop( ) {
 /* Three speakers, one tone each  */
  noTone(8);   		  // turn off tone function for pin 8:
  tone(6, 440, 200);	  // play a note on pin 6 for 200 ms:
  tone(9, 440, 200);	  // play a note on pin 9 for 200 ms:
  delay(200);

  noTone(6);		  // turn off tone function for pin 6:
  tone(7, 494, 500);	  // play a note on pin 7 for 500 ms:
  tone(9, 494, 500);	  // play a note on pin 9 for 500 ms:
  delay(500);

  noTone(7);		  // turn off tone function for pin 7:
  tone(8, 523, 300);	  // play a note on pin 8 for 500 ms:
  tone(9, 523, 300);	  // play a note on pin 9 for 500 ms:
  delay(300);

/*  Three tones, one speaker */

   noTone(9);		  // turn off tone function for pin 9:
   tone(9, 440, 200);	  // play a note on pin 9 for 200 ms:
   delay(200);
   noTone(9);		  // turn off tone function for pin 9:
   tone(9, 494, 500);	  // play a note on pin 9 for 500 ms:
   delay(500);
   noTone(9);		  // turn off tone function for pin 9:
   tone(9, 523, 300);	  // play a note on pin 9 for 500 ms:

}