int led1 = 7;
int led2 = 5;
int led3 = 3;
int led4 = 2;

void setup() {
  Serial.begin(9600);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  Serial.println("Jika tekan angka 1, lampu LED berwarna merah akan menyala.");
  Serial.println("Jika tekan angka 2, lampu LED berwarna merah akan mati.");
  Serial.println("Jika tekan angka 3, 12 lampu LED akan menyala bersamaan.");
  Serial.println("Jika tekan angka 4, 12 lampu LED akan menyala secara berurutan dengan delay 500ms.");
  Serial.println("Jika tekan angka 5, 12 lampu LED akan beralih antara menyala dan mati (flip flop).");
  Serial.println("Jika tekan angka 6, semua lampu LED akan dimatikan.");
}


void loop() {
  if (Serial.available() > 0) {
    char command = Serial.read();
    switch (command) {
      case '1':
        command1();
        break;
      case '2':
        command2();
        break;
      case '3':
        command3();
        break;
      case '4':
        while (true) {
          command4();
          char command = Serial.read();
          if (command == '1') {
            command1();
            break;
          }
          if (command == '2') {
            command2();
            break;
          }
          if (command == '3') {
            command3();
            break;
          }
          if (command == '5') {
            command5();
            break;
          }
          if (command == '6') {
            command6();
            break;
          }
        }

        break;
      case '5':
        while (true) {
          command5();
          char command = Serial.read();
          if (command == '1') {
            command1();
            break;
          }
          if (command == '2') {
            command2();
            break;
          }
          if (command == '3') {
            command3();
            break;
          }
          if (command == '4') {
            command4();
            break;
          }
          if (command == '6') {
            command6();
            break;
          }
        }

        break;
      case '6':
        command6();
        break;
      default:
        break;
    }
  }
}

void command1() {
  command6();
  digitalWrite(led1, HIGH);  // Menyalakan lampu LED merah
}

void command2() {
  digitalWrite(led1, LOW);  // Mematikan lampu LED merah
}

void command3() {
  // Menyalakan semua lampu LED bersamaan
  command6();
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
}

void command4() {
  // Menyalakan lampu LED satu per satu dengan delay 500 ms
  command6();
  digitalWrite(led1, HIGH);
  delay(100);
  digitalWrite(led1, LOW);
  delay(100);
  digitalWrite(led2, HIGH);
  delay(100);
  digitalWrite(led2, LOW);
  delay(100);
  digitalWrite(led3, HIGH);
  delay(100);
  digitalWrite(led3, LOW);
  delay(100);
  digitalWrite(led4, HIGH);
  delay(100);
  digitalWrite(led4, LOW);
  delay(100);
}

void command5() {
  // Menyalakan Lampu Secara FLIP FLOP
  command6();
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  delay(200);

  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  delay(200);
}

void command6() {
  // Mematikan Semua Lampu
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
}