#define A(x)     digitalWrite(13,x? LOW:HIGH)
#define B(x)     digitalWrite(12,x? LOW:HIGH)
#define C(x)     digitalWrite(11,x? LOW:HIGH)
#define D(x)     digitalWrite(10,x? LOW:HIGH)
#define E(x)     digitalWrite(9,x?  LOW:HIGH)
#define F(x)     digitalWrite(8,x?  LOW:HIGH)
#define G(x)     digitalWrite(7,x?  LOW:HIGH)
#define DIG1(x)  digitalWrite(3,x?  HIGH:LOW)
#define DIG2(x)  digitalWrite(2,x?  HIGH:LOW)

void LEDs(int x)
{ A(x & (1<<0));
  B(x & (1<<1));
  C(x & (1<<2));
  D(x & (1<<3));
  E(x & (1<<4));
  F(x & (1<<5));
  G(x & (1<<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(3,OUTPUT);
  pinMode(2,OUTPUT);
}

int decade=0, saat=500;
void loop() 
{ DIG2(1);
  LEDs(0b00111111); delay(saat);  //0
  LEDs(0b00000110); delay(saat);  //1
  LEDs(0b01011011); delay(saat);  //2
  LEDs(0b01001111); delay(saat);  //3
  LEDs(0b01100110); delay(saat);  //4
  LEDs(0b01101101); delay(saat);  //5
  LEDs(0b01111101); delay(saat);  //6
  LEDs(0b00000111); delay(saat);  //7
  LEDs(0b01111111); delay(saat);  //8
  LEDs(0b01101111); delay(saat);  //9

  decade++;
  DIG1(1);
  if(decade==0) LEDs(0b00111111);
  if(decade==1) LEDs(0b00000110); 
  if(decade==2) LEDs(0b01011011); 
  if(decade==3) LEDs(0b01001111); 
  if(decade==4) LEDs(0b01100110); 
  if(decade==5) LEDs(0b01101101); 
  if(decade==6) LEDs(0b01111101); 
  if(decade==7) LEDs(0b00000111); 
  if(decade==8) LEDs(0b01111111); 
  if(decade==9) LEDs(0b01101111); 
}