constexpr auto PinCount = 4;
int pins[PinCount] = {11, 12, 9, 10};

bool data[PinCount][PinCount-1] = {false};

void setup() {
}

void setPins(int row, int col){
  if(row >= PinCount || col >= PinCount-1) return;

  bool on = data[row][col];

  col = (row + col) % 3;
  if(col >= row) col++;

  for(int x = 0; x < PinCount; x++){
    if(x == row && on){
      pinMode(pins[x], OUTPUT);
      digitalWrite(pins[x], HIGH);
    } else if ( x == col && on){
      pinMode(pins[x], OUTPUT);
      digitalWrite(pins[x], LOW);
    } else {
      pinMode(pins[x], INPUT);
      digitalWrite(pins[x], LOW);
    }
  }
}

void loop() {
  for(int y = 0; y < PinCount-1; y++){
    for(int x = 0; x < PinCount; x++){
      setPins(x,y);
      delay(1);
    }
  }

  updateData();
}

auto start = millis();
int r = 3;
int c = 2;
void updateData(){
  auto now = millis();
  if(now - start > 1000){
    data[r][c] = false;
    r = (r + 1)%PinCount;
    if(r == 0){
      c = (c + 1) % (PinCount - 1);
    }
    data[r][c] = true;
    start = now;
  }
}