//array 2D
int pat[4][8] = {
  {1, 0, 0, 0, 0, 0, 0, 1},
  {0, 1, 0, 0, 0, 0, 1, 0},
  {0, 0, 1, 0, 0, 1, 0, 0},
  {0, 0, 0, 1, 1, 0, 0, 0}
};
int pin;

void setup() {

  Serial.begin(115200);

  for (int i = 6; i <= 13; i++) {
    pinMode(i, OUTPUT);
  }
}

void loop() {
  for (int row = 0; row <= 3; row++) {
    pin = 13;
    for (int col = 0; col <= 7; col++) {
      Serial.print(pat[row][col]);
      digitalWrite(pin, pat[row][col]);
      pin = pin - 1;
      
    }
    Serial.println("");
    delay(500);
  }
  for (int row = 3; row >= 0; row--) {
    pin = 13;
    for (int col = 0; col <= 7; col++) {
      Serial.print(pat[row][col]);
      digitalWrite(pin, pat[row][col]);
      pin = pin - 1;
      
    }
    Serial.println("");
    delay(500);
  }
}// end loop