#define LED1 2
#define LED2 3
#define LED3 4
#define LED4 5
#define LED5 6
#define LED6 7
#define LED7 8
#define LED8 9
#define LED9 10
#define BUTTON_UP A0
#define BUTTON_DOWN A1
#define BUTTON_LEFT A2
int leds[9] = { LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9 };
int led_matrix[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int values[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int current_led = 0;
bool led_state = 1;
bool button_up_pressed = 0;
bool button_down_pressed = 0;
bool button_left_pressed = 0;
int current_led_column = 0;
int current_led_row = 0;
int counter = 1;
void setup() {
  for (int i = 0; i < 9; i++) {
    pinMode(leds[i], OUTPUT);
  }
  pinMode(BUTTON_UP, INPUT_PULLUP);
  pinMode(BUTTON_DOWN, INPUT_PULLUP);
  pinMode(BUTTON_LEFT, INPUT_PULLUP);
  Serial.begin(9600);
}
void buttons() {
  if (!digitalRead(BUTTON_UP) and !button_up_pressed) {
    button_up_pressed = true;
    current_led_column = (current_led_column + 1) % 3;
  }
  if (digitalRead(BUTTON_UP) and button_up_pressed) {
    button_up_pressed = false;
  }
  if (!digitalRead(BUTTON_LEFT) and !button_left_pressed) {
    button_left_pressed = true;
    current_led_row = (current_led_row + 1) % 3;
  }
  if (digitalRead(BUTTON_LEFT) and button_left_pressed) {
    button_left_pressed = false;
  }
  current_led = current_led_row * 3 + current_led_column;
  //Serial.println(digitalRead(BUTTON_LEFT));
  if (!digitalRead(BUTTON_DOWN) and !button_down_pressed) {
    button_down_pressed = true;
    values[current_led] = counter;
    counter++;
  }
  if (digitalRead(BUTTON_DOWN) and button_down_pressed) {
    button_down_pressed = false;
  }
}
int empty() {
  int i = 0;
  while (values[i] > 0) i++;
  return i;
}
void blink() {
  for (int i = 0; i < 9; i++) {
    if (current_led != i) {
      digitalWrite(leds[i], values[i]);
    }
  }
  if (millis() % 300 == 0) {
    led_state = !led_state;
    digitalWrite(leds[current_led], led_state);
  }
}
void output() {
  for (int i = 0; i < 9; i++) {
    if (i % 3 == 0) Serial.println();
    Serial.print(values[i]);
    Serial.print(" ");
  }
}
void loop() {
  //Ввод пятнашек
  while (counter < 9) {
    blink();
    buttons();
    delay(1);
  }
  output();
  //Бесконечный цикл
  while (true)
    ;
}