#define led_merah 14 
  #define led_kuning 12
    #define led_hijau 13
      #define waktu 1000

      void setup() {
        pinMode(13, OUTPUT);
          pinMode(12, OUTPUT);
            pinMode(14, OUTPUT);
              
              }

              void loop() {
                // put your main code here, to run repeatedly:
                  digitalWrite(14, HIGH);
                    delay(waktu );
                      digitalWrite(14, LOW);
                        digitalWrite(12, HIGH);
                          delay(waktu);
                            digitalWrite(12, LOW);
                              digitalWrite(13, HIGH);
                                delay(waktu);
                                  digitalWrite(13, LOW);
                                    digitalWrite(12, HIGH);
                                      delay(waktu);
                                        digitalWrite(12, LOW);
                                        }