// Define pins for 7-segment display (common anode)
int segA = 2;
int segB = 3;
int segC = 4;
int segD = 5;
int segE = 6;
int segF = 7;
int segG = 8;

// Define pins for buttons
int buttonIncrement = 9;
int buttonDecrement = 10;

// Variables to hold the current count and button states
int count = 0;
int lastButtonStateIncrement = HIGH;
int lastButtonStateDecrement = HIGH;

// Segment patterns for digits 0-9
const int digits[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
};

void setup() {
  pinMode(segA, OUTPUT);
  pinMode(segB, OUTPUT);
  pinMode(segC, OUTPUT);
  pinMode(segD, OUTPUT);
  pinMode(segE, OUTPUT);
  pinMode(segF, OUTPUT);
  pinMode(segG, OUTPUT);
  
  pinMode(buttonIncrement, INPUT_PULLUP);
  pinMode(buttonDecrement, INPUT_PULLUP);
  
  displayDigit(count);
}

void loop() {
  int currentButtonStateIncrement = digitalRead(buttonIncrement);
  int currentButtonStateDecrement = digitalRead(buttonDecrement);
  
  if (currentButtonStateIncrement == LOW && lastButtonStateIncrement == HIGH) {
    count = (count + 1) % 10;
    displayDigit(count);
    delay(200);
  }

  if (currentButtonStateDecrement == LOW && lastButtonStateDecrement == HIGH) {
    count = (count - 1 + 10) % 10;
    displayDigit(count);
    delay(200);
  }
  
  lastButtonStateIncrement = currentButtonStateIncrement;
  lastButtonStateDecrement = currentButtonStateDecrement;
}

void displayDigit(int digit) {
  digitalWrite(segA, digits[digit][0]);
  digitalWrite(segB, digits[digit][1]);
  digitalWrite(segC, digits[digit][2]);
  digitalWrite(segD, digits[digit][3]);
  digitalWrite(segE, digits[digit][4]);
  digitalWrite(segF, digits[digit][5]);
  digitalWrite(segG, digits[digit][6]);
}