boolean num [10][7] = {0,0,0,0,0,0,1,
                       1,0,0,1,1,1,1,
                       0,0,1,0,0,1,0,
                       0,0,0,0,1,1,0,
                       1,0,0,1,1,0,0,
                       0,1,0,0,1,0,0,
                       0,1,0,0,0,0,0,
                       0,0,0,1,1,0,1,
                       0,0,0,0,0,0,0,
                       0,0,0,0,1,0,0  };
void setup()
{
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, INPUT_PULLUP); //ลดเลข
  pinMode(11, INPUT_PULLUP); //เพิ่มเลข
}
int x = 0;
void loop()
{  
  if( digitalRead(10)==LOW ){
    delay(200);
    while(digitalRead(10)==LOW){}
    x--;
    if( x < 0){
      x = 0 ;
    }
  }else if( digitalRead(11)==LOW ){
    delay(200);
    while(digitalRead(11)==LOW){}
    x++;
    if( x > 9 ){
      x = 9 ;
    }
  }
    show_num(x);
    
  
}
void show_num(int a){
  for(int i = 2 ; i <= 8 ; i ++){
    digitalWrite(i, num [a][i-2]);
  }
}