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(0);
tone(a,300);
delay(500);
noTone(a);
tone(a,500 );
delay(400);
tone(a,630);
delay(400);
tone(a,699);
delay(400);
tone(a,992);
delay(400);
tone(a,840);
delay(400);
tone(a,794);
delay(400);
tone(a,723);
delay(400);
}