int a = 0;
int b=1;
int c=2;
int d=3;
int e=4;
int f=5;
int g=6;
void setup()
{
  pinMode(a,OUTPUT);
  pinMode(b,OUTPUT);
  pinMode(c,OUTPUT);
  pinMode(d,OUTPUT);
  pinMode(e,OUTPUT);
  pinMode(f,OUTPUT);
  pinMode(g,OUTPUT);
}
void two() 
{ 
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH);
  digitalWrite(c,LOW);
  digitalWrite(d,HIGH);
  digitalWrite(e,HIGH);
  digitalWrite(f,LOW);
  digitalWrite(g,HIGH);
  delay(1000);
  }
void three() 
{ 
  digitalWrite(a,HIGH);
 digitalWrite(b,HIGH);
 digitalWrite(c,HIGH);
 digitalWrite(d,HIGH);
 digitalWrite(e,LOW);
 digitalWrite(f,LOW);
 digitalWrite(g,HIGH);
 delay(1000); 
  } 
  void four() 
{ 
  digitalWrite(a,LOW);
  digitalWrite(b,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(d,LOW);
  digitalWrite(e,LOW);
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH); 
  delay(1000);
   } 
   void five() 
{ 
digitalWrite(a,HIGH);
digitalWrite(b,LOW);
digitalWrite(c,HIGH); 
digitalWrite(d,HIGH);
digitalWrite(e,LOW);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
delay(1000);
 } 
 void six() 
{ 
  digitalWrite(a,HIGH);
  digitalWrite(b,LOW);
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH); 
  digitalWrite(e,HIGH); 
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH);
  delay(1000);
   } 
  void seven() 
{ 
  digitalWrite(a,HIGH); 
  digitalWrite(b,HIGH); 
  digitalWrite(c,HIGH); 
  digitalWrite(d,LOW); 
  digitalWrite(e,LOW); 
  digitalWrite(f,LOW); 
  digitalWrite(g,LOW); 
  delay(1000); 
  }
  void eight() 
{ 
  digitalWrite(a,HIGH); 
  digitalWrite(b,HIGH); 
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH);
  digitalWrite(e,HIGH);
  digitalWrite(f,HIGH);
  digitalWrite(g,HIGH);
      
  delay(1000); 
  }
   void nine() 
{ 
  digitalWrite(a,HIGH); 
  digitalWrite(b,HIGH); 
  digitalWrite(c,HIGH);
  digitalWrite(d,LOW); 
  digitalWrite(e,LOW); 
  digitalWrite(f,HIGH); 
  digitalWrite(g,HIGH); 
  delay(1000); 
} void zero() 
{ 
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH); 
  digitalWrite(c,HIGH);
  digitalWrite(d,HIGH);
  digitalWrite(e,HIGH);
  digitalWrite(f,HIGH); 
  digitalWrite(g,LOW); 
  delay(1000); 
} 
 
 
void one() 
{ 
  digitalWrite(a,LOW);
  digitalWrite(b,HIGH);
  digitalWrite(c,HIGH);
  digitalWrite(d,LOW); 
  digitalWrite(e,LOW); 
  digitalWrite(f,LOW);
  digitalWrite(g,LOW);
  delay(1000); 
} 
 
 
void loop()
 {
  zero(); 
  one(); 
  two();
  three(); 
  four(); 
  five(); 
  six(); 
  seven(); 
  eight(); 
  nine(); 
  
}