int SegmentScore1 = 0;
int SegmentScore2 = 0;
const int SER_Pin = 10;
const int SRCLK_Pin = 9;
const int RCLK_Pin = 8;
const int SER_Pin1 = 13;
const int SRCLK_Pin1 = 12;
const int RCLK_Pin1 = 11;

const byte digitMap[] = {
0x40,
0x79,
0x24,
0x30,
0x19,
0x12,
0x02,
0x78,
0x00,
0x10,
};

unsigned long gameStartTime;
bool gameStarted = false;
unsigned long startTime = 0;
unsigned long scoreResetTime = 0; 

void setup() {
  DDRD = 0b01111111;
  DDRC = 0b001111;
  DDRB = 0b111111;
  SegmentScore1 = 0;
  SegmentScore2 = 0;
}

void displayDigit(int digit) {
  PORTD = digitMap[digit];
}

void displayTime(unsigned long time) {
  int minutes = time / 60000;  
  int seconds = (time / 1000) % 60;  
  
  displayDigit(digitMap[11]);
  PORTC = 0b100000;

  displayDigit(minutes);
  PORTC |= 0b000010;
  delay(5);
  PORTC ^= 0b000010;
  
  displayDigit(seconds / 10);  
  PORTC |= 0b000100;  
  delay(5);
  PORTC ^= 0b000100;

  displayDigit(seconds % 10);  
  PORTC |= 0b001000;  
  delay(5);
  PORTC ^= 0b001000;

  displayDigit(minutes/10);
  PORTC |= 0b000001;  
  delay(5);
  PORTC ^= 0b000001;
}

void FX() {
  if (startTime == 0) {
    startTime = millis();  
  }
  unsigned long currentTime = millis();
  unsigned long elapsedTime = currentTime - startTime;
  
  int vol = (PINC & (1 << 4)); 
  int vol1 = (PIND & (1 << 7)); 
  
  if (vol != 0 && vol1 != 0) {
    displayTime(elapsedTime);
  }

  if (currentTime - scoreResetTime >= 20000) {
    scoreResetTime = currentTime;
    SegmentScore1 = 0;
    SegmentScore2 = 0;
  }
}

void loop() {
  int vol = (PINC & (1 << 4)); 
  int vol1 = (PIND & (1 << 7)); 
  displayDigit1(SegmentScore1);
  displayDigit2(SegmentScore2);
  FX();
  
  if (vol == 0) {
    Serial.println(vol);
    delay(500);
    SegmentScore1++;
    displayDigit1(SegmentScore1);
    if (SegmentScore1 >= 10) { 
      SegmentScore2++; 
      displayDigit2(SegmentScore2); 
      SegmentScore1 = 0; 
      return;
    }
  } 
  else if (vol1 == 0) {
    delay(500);
    SegmentScore2++;
    displayDigit2(SegmentScore2);
    if (SegmentScore2 >= 10) { 
      SegmentScore1++; 
      displayDigit1(SegmentScore1); 
      SegmentScore2 = 0;
      return; 
    }
  }
  
  unsigned long currentTime = millis();
  if (currentTime - startTime >= 20000) {  
    startTime = currentTime; 
  }
}

void displayDigit1(int digit) {
  shiftOut(SER_Pin, SRCLK_Pin, MSBFIRST, digitMap[digit]);
  digitalWrite(RCLK_Pin, LOW);
  digitalWrite(RCLK_Pin, HIGH);
}

void displayDigit2(int digit) {
  shiftOut(SER_Pin1, SRCLK_Pin1, MSBFIRST, digitMap[digit]);
  digitalWrite(RCLK_Pin1, LOW);
  digitalWrite(RCLK_Pin1, HIGH);
}