int a=10;
void setup() {
  // put your setup code here, to run once:
pinMode(a, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
//delay(50);
tone(a,880);
delay(500);
//noTone(a);
tone(a,987.77);
delay(500);
tone(a,1046.50);
delay(200);
tone(a,880);
delay(400);
tone(a,987.77);
delay(100);
tone(a,1046.50);
delay(100);
tone(a,880);
delay(1000);
tone(a,987.77);
delay(100);

}