int buzzer = 11;
void setup() {
  // put your setup code here, to run once:
pinMode(9, OUTPUT);
pinMode(11, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
tone(11,1000);
digitalWrite(9, HIGH);
delay(350);
noTone(11);
digitalWrite(9, LOW);
delay(350);
}