const int a = 2;
const int b = 3;
const int c = 4;
const int d = 5;
const int e = 6;
const int f = 7;
const int g = 8;

const int buttonPin = 9;

int count = 0;


const int numbers[10][7] = {
  {1, 1, 1, 1, 1, 1, 0}, // 0
  {0, 1, 1, 0, 0, 0, 0}, // 1
  {1, 1, 0, 1, 1, 0, 1}, // 2
  {1, 1, 1, 1, 0, 0, 1}, // 3
  {0, 1, 1, 0, 0, 1, 1}, // 4
  {1, 0, 1, 1, 0, 1, 1}, // 5
  {1, 0, 1, 1, 1, 1, 1}, // 6
  {1, 1, 1, 0, 0, 0, 0}, // 7
  {1, 1, 1, 1, 1, 1, 1}, // 8
  {1, 1, 1, 1, 0, 1, 1}  // 9
};


int lastButtonState = LOW;

void setup() {

  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);

  
  pinMode(buttonPin, INPUT_PULLUP);

  
  displayNumber(count);
}

void loop() {
  
  int buttonState = digitalRead(buttonPin);

  
  if (buttonState == LOW && lastButtonState == HIGH) {
    count = (count + 1) % 10; 
    displayNumber(count);     
    delay(200);  
  }

  
  lastButtonState = buttonState;
}


void displayNumber(int num) {
  if (num >= 0 && num <= 9) {
    digitalWrite(a, numbers[num][0]);
    digitalWrite(b, numbers[num][1]);
    digitalWrite(c, numbers[num][2]);
    digitalWrite(d, numbers[num][3]);
    digitalWrite(e, numbers[num][4]);
    digitalWrite(f, numbers[num][5]);
    digitalWrite(g, numbers[num][6]);
  }
}