int a=15;
void setup() 
{
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(12, OUTPUT);
}

void loop() 
{
  // put your main code here, to run repeatedly:
digitalRead(a);
for(int i=0;i<a;i++)
{
  if(i<5){
    tone(12,2000);
  }
  else if(i>5 && i<10)
  {
    tone(12,6000);
  }
  else{
    noTone(12);
  }
  Serial.println(i);
  delay(10000);
}
}