int red=2;
int yellow=3;
int green=4;

const byte numeral[10] =
{
  //0 = led dalam seven segment yang tidak diberikan tagangan
  //1 = led dalam seven segment yang diberikan tagangan masukan
  B11110111, // angka 9
  B11111111, // angka 8
  B11100001, // angka 7
  B10111111, // angka 6
  B10110111, // angka 5
  B01100111, // angka 4
  B11110011, // angka 3
  B11011011, // angka 2
  B01100001, // angka 1
  B11111101, // angka 0
}; 

//pin dari segment dp,G,F,E,D,C,B,A
const int segmentPins[8] = {9,13,12,11,10,8,7,6};

void setup() {
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
}

void loop() {
  digitalWrite(red, HIGH);
  digitalWrite(yellow, LOW);
  digitalWrite(green, LOW);
  for(int i=0; i <= 10; i++) 
  {
    showDigit(i);
    delay(1000);
  }

  digitalWrite(red, LOW);
  digitalWrite(yellow, HIGH);
  digitalWrite(green, LOW);
  delay(1000);

  digitalWrite(red, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(green, HIGH);
  for(int i=0; i <= 10; i++) 
  {
    showDigit(i);
    delay(1000);
  }
}

void showDigit(int number)
{
  boolean isBitSet;
  for(int segment = 1; segment < 8; segment++)
  {
    if(number < 0 || number > 9)
    {
      isBitSet = 0; //turn off all segments
    }
    else
    {
      //isBitSet will be true if given bit is 1
      isBitSet = bitRead(numeral[number], segment);
    }
    isBitSet = !isBitSet; 
    digitalWrite(segmentPins[segment], isBitSet);
  }
}