int a=2;
int b=3;
int c=4;
int d=5;
int e=6;
int f=7;
int g=8;
int b1=9;
int b2=10;
int count=0;
void setup() {
  // put your setup code here, to run once:
pinMode(a, OUTPUT);
pinMode(b, OUTPUT);
pinMode(c, OUTPUT);
pinMode(d, OUTPUT);
pinMode(e, OUTPUT);
pinMode(f, OUTPUT);
pinMode(g, OUTPUT);
pinMode(b1, INPUT);
pinMode(b2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(b1)==HIGH)
{
  count++;
  if(count==10)
  {count=9;}
}
if(digitalRead(b2)==HIGH)
{
  count--;
  if(count==-1)
  {
    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;}
}
delay(200);
}
void zero()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH );
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
  
}
void one()
{
  digitalWrite(a,LOW);
  digitalWrite(b,HIGH );
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  
}
void two()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH );
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  
}
void three()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH );
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  
}
void four()
{
  digitalWrite(a,LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  
}
void five()
{
  digitalWrite(a,HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  
}
void six()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,LOW );
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  
}
void seven()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH );
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  
}
void eight()
{
  digitalWrite(a,HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  
}
void nine()
{
  digitalWrite(a,HIGH);
  digitalWrite(b,HIGH );
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  
}