/**
   Charlieplexed LED Matrix Scanning demo.

   Copyright (C) 2019, Uri Shaked. Released under the MIT license.
*/

#define SCAN_DELAY 500

void setup() {
}

void loop() {

        pinMode(2, OUTPUT);
        digitalWrite(2, LOW);
        delay(SCAN_DELAY);
        pinMode(2, INPUT);
        //digitalWrite(2, HIGH);
        delay(SCAN_DELAY);
        pinMode(2, INPUT);
        //pinMode(3, INPUT);
        pinMode(3, OUTPUT);
        digitalWrite(3, LOW);
        delay(SCAN_DELAY);
        //pinMode(3, OUTPUT);
        pinMode(3, INPUT);
        //digitalWrite(3, HIGH);
        delay(SCAN_DELAY);

        
        pinMode(2, INPUT);
        pinMode(3, INPUT);
        delay(500);

}