#define tombol 15
int tekan = 0;

void setup() {
  Serial.begin(9600);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(tombol, INPUT);
  Serial.begin(9600);
}

void loop() {
  if(digitalRead(tombol) == HIGH){
    tekan++;
    delay(100);
  }

  if(tekan == 1){
    //Serial.println("Tombol di tekan - LED ON");
    digitalWrite(5, HIGH);
    digitalWrite(18, LOW);
    digitalWrite(19, LOW);
  }
  else if (tekan == 2){
    digitalWrite(5, LOW);
    digitalWrite(18, HIGH);
    digitalWrite(19, LOW);
  }
  else if (tekan == 3){
    digitalWrite(5, LOW);
    digitalWrite(18, LOW);
    digitalWrite(19, HIGH);
  }
  else {
    tekan = 0;
    digitalWrite(5, LOW);
    digitalWrite(18, LOW);
    digitalWrite(19, LOW);
  }
  Serial.println(tekan);
}