7-segment Bytes.ino

int SEG_A = 4; //define which pins connect to which segments   
int SEG_B = 5;
int SEG_C = 8;
int SEG_D = 7;
int SEG_E = 6;
int SEG_F = 3;
int SEG_G = 2;
int SEG_DOT = 9;

int pins[] = {SEG_A, SEG_B, SEG_C, SEG_D, SEG_E, SEG_F, SEG_G, SEG_DOT};
int numPins = 8;

//Segment data: in order (DOT)GFECDBA
byte DIG_0 = B00111111; //    0 - Segments ABCDEF
byte DIG_1 = B00000110; //    1 - segments BC
byte DIG_2 = B01011011; //    2 - segments ABDEG
byte DIG_3 = B01001111; //    3 - segments ABCDG
byte DIG_4 = B01100110; //    4 - segments BCFG
byte DIG_5 = B01101101; //    5 - segments ACDFG
byte DIG_6 = B01111101; //    6 - segments ACDEFG
byte DIG_7 = B00000111; //    7 - segments ABC
byte DIG_8 = B01111111; //    8 - segments ABCDEFG
byte DIG_9 = B01100111; //    9 - segments ABCFG

int digitData[] = {DIG_0, DIG_1, DIG_2, DIG_3, DIG_4, DIG_5, DIG_6, DIG_7, DIG_8, DIG_9}; 

int pause = 500;

void setup() {
  // put your setup code here, to run once:
  for (int i = 0; i < numPins; i++){
    pinMode(pins[i], OUTPUT);
  }
  turnOffAllSegments();
}

void loop() {
  // put your main code here, to run repeatedly:
  int largestDigit = 9;

  for (int i = 0; i <= largestDigit; i++){
    displayDigit(i);
    delay(pause);
  }
}

void turnOffAllSegments(){
  for (int i = 0; i < numPins; i++){
    digitalWrite(pins[i], HIGH);
  }
}

void displayDigit(int num){

  turnOffAllSegments();

  if (num >=0 && num <= 9){
    for (int i = 0; i < numPins; i++){
      if (bitRead(digitData[num], i) == 1){
        digitalWrite(pins[i], LOW);
      }
    }
  }
}