int index = 0;
const int LED[] = {10,11,12};

const byte segmentCodes[] = {
  0b11000000, // 0
  0b11111001, // 1
  0b10100100, // 2
  0b00110000, // 3
  0b00011001, // 4
  0b00010010, // 5
  0b00000010, // 6
  0b11111000, // 7
  0b00000000, // 8
  0b00010000, // 9
  0b00001000, // A
  0b00000011, // B
  0b01000110, // C
  0b00100001, // D
  0b00000110, // E
  0b10001110};  // F
void setup() {
// กำหนดขาที่ต่อกับหลอด LED 7-Segment ในฐาน 16 (A, B, C, D, E, F, G)
 pinMode(2,OUTPUT);//a
 pinMode(3,OUTPUT);//b
 pinMode(4,OUTPUT);//c
 pinMode(5,OUTPUT);//d
 pinMode(6,OUTPUT);//e
 pinMode(7,OUTPUT);//f
 pinMode(8,OUTPUT);//g
 pinMode(9,OUTPUT);//poirt
 for (int i = 0; i < sizeof(LED) / sizeof(LED[0]); i++) {
    pinMode(LED[i], OUTPUT);
}
}
void displayDigit(byte value) {
  digitalWrite(2, bitRead(value, 0));
  digitalWrite(3, bitRead(value, 1));
  digitalWrite(4, bitRead(value, 2));
  digitalWrite(5, bitRead(value, 3));
  digitalWrite(6, bitRead(value, 4));
  digitalWrite(7, bitRead(value, 5));
  digitalWrite(8, bitRead(value, 6));
}

void turnOnLED(int index) {
  digitalWrite(LED[index], LOW);
}
void turnOffLED(int index) {
  digitalWrite(LED[index], HIGH); // ปิด LED สีที่ต้องการ
}

void countdown_time(int time) {
  for (int i = time; i >= 0; i--) {
    displayDigit(segmentCodes[i]);
    delay(1000);
  }
}

void loop() {

  turnOnLED(2); 
  turnOffLED(0);
  turnOffLED(1);
  countdown_time(4);

  
  turnOffLED(2); 
  turnOnLED(1);
  countdown_time(3);
  
  turnOffLED(1);
  turnOnLED(0); 
  countdown_time(5);

}