// 2-dimensional array of row pin numbers:
const int rows[10] = {
  16, 17, 18, 19, 21, 22, 4, 5, 13, 14
};

// 2-dimensional array of column pin numbers:
const int cols[6] = {
  23, 25, 26, 27, 32, 33
};


void setup() {
  Serial.begin(115200);
  // initialize the I/O Rows pins as outputs iterate over the pins:
  for (int thisPin = 0; thisPin < 10; thisPin++) {
    // initialize the output pins:
    pinMode(rows[thisPin], OUTPUT);

    // take the col pins (i.e. the cathodes) high to ensure that the LEDS are off:
    digitalWrite(rows[thisPin], HIGH);
    //Serial.print("row: ");Serial.println(rows[thisPin]);
  }

  // initialize the I/O Cols pins as outputs iterate over the pins:
  for (int thisPin = 0; thisPin < 6; thisPin++) {
    // initialize the output pins:
    pinMode(cols[thisPin], OUTPUT);

    // take the col pins (i.e. the cathodes) high to ensure that the LEDS are off:
    digitalWrite(cols[thisPin], LOW);
    //Serial.print(" col: ");Serial.println(cols[thisPin]);
  }


  // End setup
}


void loop() {

  digitalWrite(cols[0], HIGH);
  digitalWrite(rows[0], LOW);//digitalWrite(rows[1], HIGH);
  digitalWrite(cols[2], HIGH);
  digitalWrite(rows[0], LOW);//digitalWrite(rows[1], LOW);

  digitalWrite(cols[1], HIGH);
  digitalWrite(rows[2], LOW);//digitalWrite(rows[1], HIGH);


  // End loop
}





void red(int row, int col){
  digitalWrite(cols[col], HIGH);
  digitalWrite(rows[row], LOW);digitalWrite(rows[row+1], HIGH);
}

void yellow(int row, int col){
  digitalWrite(cols[col], HIGH);
  digitalWrite(rows[row], LOW);digitalWrite(rows[row+1], LOW);
}

void dark(int row, int col){
  digitalWrite(cols[col], LOW);
  digitalWrite(rows[row], HIGH);digitalWrite(rows[row+1], HIGH);
}


void test(){
  red(0,0); //rows, cols
  delay(1000);
  yellow(0,0); //rows, cols
  delay(1000);
  dark(0,0); //rows, cols
  delay(1000);

  red(0,1); //rows, cols
  delay(1000);
  yellow(0,1); //rows, cols
  delay(1000);
  dark(0,1); //rows, cols
  delay(1000);


  red(2,0); //rows, cols
  delay(1000);
  yellow(2,0); //rows, cols
  delay(1000);
  dark(2,0); //rows, cols
  delay(1000);

  red(2,1); //rows, cols
  delay(1000);
  yellow(2,1); //rows, cols
  delay(1000);
  dark(2,1); //rows, cols
  delay(1000);

  red(0,0); //rows, cols
  red(0,1); //rows, cols
  red(2,0); //rows, cols
  red(2,1); //rows, cols
  delay(1000);

  dark(0,0); //rows, cols
  dark(0,1); //rows, cols
  dark(2,0); //rows, cols
  dark(2,1); //rows, cols
  delay(1000);
}