int speed = 100;

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

void setup() {


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

}

void loop() {
  LED(1, 1);
  LED(2, 2);
  LED(3, 3);
  LED(4, 4);
  LED(5, 5);

  LED(5, 1);
  LED(4, 2);
  LED(2, 4);
  LED(1, 5);

}


void LED(int x, int y) {
  digitalWrite(column[y - 1], 1);
  digitalWrite(line[x - 1], 1);

  digitalWrite(column[y - 1], 0);
  digitalWrite(line[x - 1], 0);

}