Basic Speaker Tone

/*
  Multiple tones from a piezo speaker
 
 circuit:
 put a small piezo speaker on digital pin 8 
 and then ground it
 (need not be a PWM pine)
 no resistor needed
 
 modified by Ringotron5000
 */

int speakerPin = 8;

void setup() {
}

void loop() {
  tone(speakerPin, 440, 200);  //play tone on pin 8 of 440 Hz for 200 ms
  delay(200);
 tone(speakerPin, 240, 200);  //play tone on pin 8 of 240 Hz for 200 ms
  delay(200);
  tone(speakerPin, 120, 200);
  delay(200);
   tone(speakerPin, 880, 200);
  delay(200);

  noTone(speakerPin);    // turn off tone function for pin 8:
  
  delay(3000);  // give your ears a break for 3 seconds
}