void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(14, INPUT);
  pinMode(25, OUTPUT);
  pinMode(21, INPUT_PULLUP);
  pinMode(4, OUTPUT);
}

void loop() {
  int tombol= digitalRead(14);
  if(tombol==1){
    digitalWrite(25, HIGH);
  }
  else{
    digitalWrite(25, LOW);
  }
  int btn= digitalRead(21);
  if(btn==1){
    digitalWrite(4, HIGH);
  }
  else{
    digitalWrite(4, LOW);
  }
  Serial.print("nilai lampu kiri ="); Serial.println(digitalRead(14));
  delay(10); // this speeds up the simulation
}