byte inSer, str;
void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(9600);
  Serial.println("Kontrol LED ");
  Serial.println("Ketik 1 / 2 / 3");
}

void loop() {
  inSer = Serial.read();
  str = char (inSer); 
  switch(str) {
    case('1'):
    Serial.println("(1) LED BIRU BERKEDIP"); 
    digitalWrite(3, HIGH); 
    digitalWrite(4, HIGH);
    for (int i = 0; i < 5; i++) {
        digitalWrite(2, HIGH);
        delay(100);
        digitalWrite(2, LOW);
        delay(200);
      }
    digitalWrite(2, HIGH);
    break;
    case('2'):
    Serial.println("(2) LED KUNING BERKEDIP"); 
    digitalWrite(2, HIGH); 
    digitalWrite(4, HIGH);
    for (int i = 0; i < 5; i++) {
        digitalWrite(3, HIGH);
        delay(100);
        digitalWrite(3, LOW);
        delay(200);
      }
    digitalWrite(3, HIGH);
    break;
    case('3'):
    Serial.println("(3) LED UNGU BERKEDIP"); 
    digitalWrite(2, HIGH); 
    digitalWrite(3, HIGH);
    for (int i = 0; i < 5; i++) {
        digitalWrite(4, HIGH);
        delay(100);
        digitalWrite(4, LOW);
        delay(200);
      }
    digitalWrite(4, HIGH);
    break;
  }
}