Lauflicht 5x5 Matrix

int speed = 100;
int x;
int y;

int line[] = {8,7,6,5,4};
int column[] = {13,12,11,10,9};

void setup()
{
  for (int i = 4; i < 14; i++) {
    pinMode(i, OUTPUT);
  }
}

void loop()
{
  for (int y = 8; y >3; y--) {

    digitalWrite(y, 1);

    for (int x = 13; x > 8; x--) {
      digitalWrite(x, 1);
      delay(100);
      digitalWrite(x, 0);
    }

    digitalWrite(y, 0);
  }
}