/* Charlieplexing example: 3 pins driving 6 LEDs. */

#define SCAN_DELAY 300
#define SCAN_DELAY2 500

    byte LED_PINS[] = { 2, 3, 4 , 5 , 6 , 7 , 8 , 9 , 10};
    const byte LED_PIN_COUNT = sizeof(LED_PINS);

    void setup() {
    }

    void loop() {
      //test();
      //delay(1000);
      
      {
      pinMode(LED_PINS[0], OUTPUT);
      pinMode(LED_PINS[1], OUTPUT);
      pinMode(LED_PINS[3], OUTPUT);
      pinMode(LED_PINS[5], OUTPUT);
      //pinMode(LED_PINS[4], OUTPUT);
      digitalWrite(LED_PINS[1], LOW);
      digitalWrite(LED_PINS[0], HIGH);
      delay(1000);

      digitalWrite(LED_PINS[1], HIGH);
      digitalWrite(LED_PINS[0], LOW);
      delay(1000);

      digitalWrite(LED_PINS[3], HIGH);
      digitalWrite(LED_PINS[3], LOW);
      //delay(1000);

      //delay(500);
      //pinMode(LED_PINS[2], INPUT);
      //pinMode(LED_PINS[0], INPUT);
      //pinMode(LED_PINS[0], OUTPUT);
      //pinMode(LED_PINS[5], OUTPUT);
      

      digitalWrite(LED_PINS[0], LOW);
      digitalWrite(LED_PINS[5], HIGH);
      delay(1000);

      //digitalWrite(LED_PINS[2], LOW);
      //digitalWrite(LED_PINS[4], HIGH);
      pinMode(LED_PINS[0], INPUT);
      pinMode(LED_PINS[1], INPUT);
      pinMode(LED_PINS[5], INPUT);
      pinMode(LED_PINS[3], INPUT);

      }

      delay(800);

    }
    void test(){
      for (byte i = 0; i < LED_PIN_COUNT; i++) {
        for (byte j = 0; j < LED_PIN_COUNT; j++) {
          if (i != j) {
            pinMode(LED_PINS[j], OUTPUT);
            pinMode(LED_PINS[i], OUTPUT);
            digitalWrite(LED_PINS[j], LOW);
            digitalWrite(LED_PINS[i], HIGH);
            delay(SCAN_DELAY);
            pinMode(LED_PINS[j], INPUT);
            pinMode(LED_PINS[i], INPUT);
          }
        }
      delay(SCAN_DELAY2);
      }
    }