#define CA
#ifdef CC 
   #define ON HIGH 
   #define OFF LOW
#endif

#ifdef CA
   #define ON LOW 
   #define OFF HIGH
#endif

int pinA = 11, pinB = 7, pinC = 4, pinD = 2, pinE = 1, pinF = 10, pinG = 5;
int pinDP = 3, D1 = 12, D2 = 9, D3 = 8, D4 = 6;
int digit_pins[4] = {D1, D2, D3, D4};

void setup() {

  pinMode(pinA, OUTPUT);
  pinMode(pinB, OUTPUT);
  pinMode(pinC, OUTPUT);
  pinMode(pinD, OUTPUT);
  pinMode(pinE, OUTPUT);
  pinMode(pinF, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinDP, OUTPUT);
  pinMode(D1, OUTPUT);
  pinMode(D2, OUTPUT);
  pinMode(D3, OUTPUT);
  pinMode(D4, OUTPUT);
}

void loop() {

  display_on (); 
  zero ();  delay (1500); 
  one ();   delay (1500); 
  two ();   delay (1500); 
  three (); delay (1500); 
  four ();  delay (1500); 
  five ();   delay (1500); 
  six ();   delay (1500); 
  seven (); delay (1500); 
  eight (); delay (1500); 
  nine (); delay (1500);
  display_off (); 
  delay (1500);
}


    void digit_on(int pos_index) {
      digitalWrite(digit_pins[pos_index], HIGH);
    }

    void digit_off(int pos_index) {
      digitalWrite(digit_pins[pos_index], LOW);
    }


    void display_off (){
      for (int i = 0; i < 4; i++) {
        digit_off(i);
      }
    }

    void display_on (){
      for (int i = 0; i < 4; i++) {
        digit_on(i);
      }
    }

//functions representing numbers 0-9
void zero(){
digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, ON);
digitalWrite(pinE, ON);
digitalWrite(pinF, ON);
digitalWrite(pinG, OFF);
}

void one(){
  digitalWrite(pinA, OFF);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, OFF);
digitalWrite(pinE, OFF);
digitalWrite(pinF, OFF);
digitalWrite(pinG, OFF);
}

void two() {
  digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, OFF);
digitalWrite(pinD, ON);
digitalWrite(pinE, ON);
digitalWrite(pinF, OFF);
digitalWrite(pinG, ON);
}
  
void three() {
  digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, ON);
digitalWrite(pinE, OFF);
digitalWrite(pinF, OFF);
digitalWrite(pinG, ON);
}
    
void four() {
  digitalWrite(pinA, OFF);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, OFF);
digitalWrite(pinE, OFF);
digitalWrite(pinF, ON);
digitalWrite(pinG, ON);
}
    
void five(){
  digitalWrite(pinA, ON);
digitalWrite(pinB, OFF);
digitalWrite(pinC, ON);
digitalWrite(pinD, ON);
digitalWrite(pinE, OFF);
digitalWrite(pinF, ON);
digitalWrite(pinG, ON);
}
    
void six(){
  digitalWrite(pinA, ON);
digitalWrite(pinB, OFF);
digitalWrite(pinC, ON);
digitalWrite(pinD, ON);
digitalWrite(pinE, ON);
digitalWrite(pinF, ON);
digitalWrite(pinG, ON);
}
    
void seven(){
  digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, OFF);
digitalWrite(pinE, OFF);
digitalWrite(pinF, OFF);
digitalWrite(pinG, OFF);
}
    
void eight(){
  digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, ON);
digitalWrite(pinE, ON);
digitalWrite(pinF, ON);
digitalWrite(pinG, ON);
}
    
void nine(){
  digitalWrite(pinA, ON);
digitalWrite(pinB, ON);
digitalWrite(pinC, ON);
digitalWrite(pinD, OFF);
digitalWrite(pinE, OFF);
digitalWrite(pinF, ON);
digitalWrite(pinG, ON);
}