int led1 = 2;
int led2 = 3;
int led3 = 4;
int led4 = 5;
void setup() {
  Serial.begin(9600);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  Serial.println("Angka '6' mematikan semua lampu LED, Angka '1' menghidupkan LED 1 merah, Angka '2' mematikan LED 1 merah, Angka '3' menyalakan 4 lampu LED, Angka '4' menyalakan 4 LED flip-flop, Angka '5' menyalakan 4 LED running led.");

}

void loop() {
  if(Serial.available()>0){
    char command = Serial.read();
    switch (command){
      case '6':
        digitalWrite(led1, LOW);
        digitalWrite(led2, LOW);
        digitalWrite(led3, LOW);
        digitalWrite(led4, LOW);
        Serial.println("All LEDs turned off");
        break;
      case '1':
        digitalWrite(led1, HIGH);
        digitalWrite(led2, LOW);
        digitalWrite(led3, LOW);
        digitalWrite(led4, LOW);
        Serial.println("LED 1 turned on");
        break;
      case '2':
        digitalWrite(led1, LOW);
        Serial.println("LED 1 turned off");
        break;
      case '3':
        digitalWrite(led1, HIGH);
        digitalWrite(led2, HIGH);
        digitalWrite(led3, HIGH);
        digitalWrite(led4, HIGH);
        Serial.println("All LED turned on");
        break;
      case '4':
      while(true){
        digitalWrite(led1, HIGH);
        digitalWrite(led2, LOW);
        digitalWrite(led3, HIGH);
        digitalWrite(led4, LOW);
        delay(300);
        digitalWrite(led1, LOW);
        digitalWrite(led2, HIGH);
        digitalWrite(led3, LOW);
        digitalWrite(led4, HIGH);
        delay(300);
        Serial.println("All LED Blink/flip-flop");
        if (Serial.available() > 0) {
            char newCommand = Serial.read();
            if (newCommand == '6' ||newCommand == '5' ||newCommand == '4' ||newCommand == '3' ||newCommand == '2' ||newCommand == '1') {
              digitalWrite(led1, LOW);
              digitalWrite(led2, LOW);
              digitalWrite(led3, LOW);
              digitalWrite(led4, LOW);
              Serial.println("Switching Mode...");
              break;
            }
          }
        }
        break;
      case '5':
      for(int j = 1; j>=1; j++){
        digitalWrite(led4, LOW);
        digitalWrite(led1, HIGH);
        delay(200);
        digitalWrite(led1, LOW);
        digitalWrite(led2, HIGH);
        delay(200);
        digitalWrite(led2, LOW);
        digitalWrite(led3, HIGH);
        delay(200);
        digitalWrite(led3, LOW);
        digitalWrite(led4, HIGH);
        delay(200);
        Serial.println("All LED Running Led");
        if (Serial.available() > 0) {
            char newCommand = Serial.read();
            if (newCommand == '6' ||newCommand == '5' ||newCommand == '4' ||newCommand == '3' ||newCommand == '2' ||newCommand == '1') {
              digitalWrite(led1, LOW);
              digitalWrite(led2, LOW);
              digitalWrite(led3, LOW);
              digitalWrite(led4, LOW);
              Serial.println("Switching Mode...");
              break;
            }
          }
      }
        break;
    }
  }
}