#define LEDPIN 12
#define buzzer 19
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(12, OUTPUT);
  pinMode(18, OUTPUT);
}

void loop() {
  digitalWrite(12, HIGH);
  delay(1000);
   digitalWrite(12, LOW);
   delay(1000);
   tone(18,500,1000);
   delay(3000);
    // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}