void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(5, INPUT);
  pinMode(18,OUTPUT);
  pinMode(19, OUTPUT);
}

int on_off = 0;
int nilai = 0;

void loop() {
  // put your main code here, to run repeatedly:
  int nilai = digitalRead(5);
  if(nilai == 1) { 
    on_off++;
    Serial.println(on_off);
    if (on_off == 1) {
      digitalWrite(18, HIGH);
      digitalWrite(19, LOW);
    } else if (on_off == 2) {
      digitalWrite(18,LOW);
      digitalWrite(19,HIGH);
    } else {
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      on_off = 0;
    }
 }
delay(300); // this speeds up the simulation
}