void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(27, INPUT);
  pinMode(4, OUTPUT);
}

void loop() {
  int slide=digitalRead(27);
  if(slide==1)
  tone(4,1200);
  else
  noTone(4);
  // put your main code here, to run repeatedly:
  delay(100); // this speeds up the simulation
}