#define A 0
#define B 1 
#define C 2
#define D 3
#define E 4
#define F 5
#define G 6
#define BUTTON 13

int count =0;
int status;
void setup() 
{
  pinMode(A,OUTPUT);
  pinMode(B,OUTPUT);
  pinMode(C,OUTPUT);
  pinMode(D,OUTPUT);
  pinMode(E,OUTPUT);
  pinMode(F,OUTPUT);
  pinMode(G,OUTPUT);
  pinMode(BUTTON,INPUT_PULLUP);
}

void loop() 
{
  status=digitalRead(BUTTON);
  delay(1.5*100);
  if(status==0)
  {
  count++;
  }
  if(count>=10)
  {
    count=0;
  }
  switch(count)
  {
    case 0:
      zero();
      break;
    case 1:  
      one();
      break;
    case 2:  
      two() ;
      break;
    case 3:
      three();
      break;
    case 4:
      four();
      break;
    case 5:
      five();
      break;
    case 6:
      six();
      break;
    case 7:
      seven();
      break;
    case 8:
      eight();
      break;
    case 9:
      nine();
      break;
  }     
}

  void zero()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,HIGH);
  
  }
  void one()
  {
  digitalWrite(A,HIGH);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);
  
  }

  void two()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,HIGH);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,HIGH);
  digitalWrite(G,LOW);
  
  }
  void three()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,LOW);
  
  }
  void four()
  {
  digitalWrite(A,HIGH);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);
  
  }
  void five()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,HIGH);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,HIGH);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);
  
  }
  void six()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,HIGH);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);

  }
  void seven()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,HIGH);
  digitalWrite(E,HIGH);
  digitalWrite(F,HIGH);
  digitalWrite(G,HIGH);

  }
  void eight()
  {
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,LOW);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);

  }
  void nine()
  {  
  digitalWrite(A,LOW);
  digitalWrite(B,LOW);
  digitalWrite(C,LOW);
  digitalWrite(D,LOW);
  digitalWrite(E,HIGH);
  digitalWrite(F,LOW);
  digitalWrite(G,LOW);

  }