int Relay =4;  // The pin at which we want to connect the relay

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Hello, ESP32!");
  pinMode(Relay, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(Relay, HIGH); // Turn On the LED
  if(digitalRead(Relay)==1){ Serial.println("ON");}
  delay(500); // this speeds up the simulation
  digitalWrite(Relay, LOW);  // Turn Off the LED
  if(digitalRead(Relay)==0){ Serial.println("OFF");}
  delay(500);
}