int r1=12;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(r1,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(r1, HIGH);
  delay(2000); // this speeds up the simulation
  digitalWrite(r1, LOW);
  delay(2000);
}