const int buzzer = 1; //buzzer to arduino pin 9


void setup(){
 
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 9 as an output

}

void loop(){
 
  for (int i = 0; i < 20000; i=i+10)
  {
    tone(buzzer, i); // Send 1KHz sound signal...
    delay(50);        // ...for 1 sec
    Serial.println(i);
  }
}