int a = 3;
int b = 4;
int c = 5;
int d = 6;
int e = 7;
int f = 8;
int g = 9;
int de = 500;

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

void loop()
{
  //0
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 0);
  digitalWrite (f, 0);
  digitalWrite (g, 1);
  delay(de);

  //1
  digitalWrite (a, 1);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 1);
  digitalWrite (e, 1);
  digitalWrite (f, 1);
  digitalWrite (g, 1);
  delay(de);

  //2
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 1);
  digitalWrite (d, 0);
  digitalWrite (e, 0);
  digitalWrite (f, 1);
  digitalWrite (g, 0);
  delay(de);
  //3
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 1);
  digitalWrite (f, 2);
  digitalWrite (g, 0);
  delay(de);
  //4
  digitalWrite (a, 1);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 1);
  digitalWrite (e, 1);
  digitalWrite (f, 0);
  digitalWrite (g, 0);
  delay(de);
  //5
  digitalWrite (a, 0);
  digitalWrite (b, 1);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 1);
  digitalWrite (f, 0);
  digitalWrite (g, 0);
  delay(de);
  //6
  digitalWrite (a, 0);
  digitalWrite (b, 1);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 0);
  digitalWrite (f, 0);
  digitalWrite (g, 0);
  delay(de);
  //7
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 1);
  digitalWrite (e, 1);
  digitalWrite (f, 1);
  digitalWrite (g, 1);
  delay(de);
  //8
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 0);
  digitalWrite (f, 0);
  digitalWrite (g, 0);
  delay(de);
  //9
  digitalWrite (a, 0);
  digitalWrite (b, 0);
  digitalWrite (c, 0);
  digitalWrite (d, 0);
  digitalWrite (e, 1);
  digitalWrite (f, 0);
  digitalWrite (g, 0);
  delay(de);
}