char a=2;
char b=3;
char c=4;
char d=5;
char e=6;
char f=7;
char g=8;

char digit1 = 13;
char digit2 = 12;
char digit3 = 11;
char digit4 = 10;


char Number[10] ={
  0b1111110, // 0
  0b0110000, // 1
  0b1101101, // 2 
  0b1111001, // 3
  0b0110011, // 4
  0b1011011, // 5
  0b1011111, // 6
  0b1110000, // 7
  0b1111111, // 8
  0b1111011, // 9 
  };

void display(int n)
{
  digitalWrite(a, (Number[n] & 0b1000000));
  digitalWrite(b, (Number[n] & 0b0100000));
  digitalWrite(c, (Number[n] & 0b0010000));
  digitalWrite(d, (Number[n] & 0b0001000));
  digitalWrite(e, (Number[n] & 0b0000100));
  digitalWrite(f, (Number[n] & 0b0000010));
  digitalWrite(g, (Number[n] & 0b0000001));
}

void offdisplay()
{
  digitalWrite(digit1, 1);
  digitalWrite(digit2, 1);
  digitalWrite(digit3, 1);
  digitalWrite(digit4, 1);
}
 


void setup()
{
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);

  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
  pinMode(digit3, OUTPUT);
  pinMode(digit4, OUTPUT);

}

long count = 0;

void loop()
{
  display (7);
  digitalWrite(digit1, 0);
  digitalWrite(digit2, 1);
  digitalWrite(digit3, 0);
  digitalWrite(digit4, 1);
 
}