const int led[7] = {2, 3, 4, 5, 6, 7, 8};
int nilai = 0;
int i;
const int tombol = 12;
void setup()
{
  Serial.begin(9600);
  for(int i=0; i<=6; i++){
    pinMode(led[i], OUTPUT);
  }
  pinMode(tombol, INPUT_PULLUP);
 
}

void loop()
{
  if(tombol == HIGH){
    nilai++;
  }
  delay(300);
  switch (nilai){
    case 0 :
    for(i=0; i<= 5; i++){
        digitalWrite(led[i], LOW);
    }
    digitalWrite(led[6], HIGH);
    break;

    case 1:
    for(i=0;i<=6;i++){
      if(i != 1 && i != 2){
        digitalWrite(led[i], HIGH);
        }
        else{
          digitalWrite(led[i], LOW);
        }
    }
    break;

    case 2:
    for (i = 0; i<= 6; i++){
      if (i != 2 && i != 5){
        digitalWrite(led[i], LOW);
        }
      else{
        digitalWrite(led[i], HIGH);
      }
    }
    break;

    case 3:
    for(i=0;i<=6;i++){
      if(i!=4 && i!=5){
        digitalWrite(led[i], LOW);
      }
      else{
        digitalWrite(led[i], HIGH);
      }
    }
    break;


    default:
    break;
  }
  Serial.println(nilai);
}