This setup will read the value of a BCD wheel and output it to a 7 segment display

/*
  bcd reader and 7 segment driver
*/

//int x = 0;
int myDelay = 1000;
int counting = 0;
 
// the setup routine runs once when you press reset:
void setup() {                
  for(int i=1; i<8; i++){
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW);
  }  
  for(int i=8; i<13; i++){
    pinMode(i, INPUT);
  }  
}

void ledDispDriver(int number){
  for(int i=1; i<8; i++){
    digitalWrite(i, LOW);
  }  
  switch(number){
    case 1:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);
    break;
    case 2:
      digitalWrite(1,HIGH);       
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(7,HIGH);     
    break;
    case 3:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(7,HIGH);     
    break;   
    case 4:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);   
    break;   
    case 5:
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);   
    break;   
    case 6:
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);      
    break;
    case 7:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(7,HIGH);      
    break;    
    case 8:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);     
    break;
    case 9:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);     
    break;
    case 0:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);  
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);   
    break;   
    default:
      digitalWrite(1,HIGH);
      digitalWrite(2,HIGH);  
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);  
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);  
    break;
  }
}

int BCDdriver(){
  int result = 0;
  if(digitalRead(9) == HIGH){
     result = 1;
  }
  if(digitalRead(10) == HIGH){
     result = result + 2;
  }
  if(digitalRead(11) == HIGH){
     result = result + 4;
  }
  if(digitalRead(12) == HIGH){
     result = result + 8;
  }  
  return result;
}

// the loop routine runs over and over again forever:
void loop() {
  int x = 0;
  x = BCDdriver();
  ledDispDriver(x);
}