int a=2;
int b=4;
int c=14;
int d=12;
int e=13;
int f=5;
int g=18;
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() {
 // for 0
 digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,0);
 digitalWrite(f,0);
 digitalWrite(g,1);
 delay(1000);

 // for 1
 digitalWrite(a,1);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,1);
 digitalWrite(e,1);
 digitalWrite(f,1);
 digitalWrite(g,1);
 delay(1000);

 // for 2
 digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,1);
 digitalWrite(d,0);
 digitalWrite(e,0);
 digitalWrite(f,1);
 digitalWrite(g,0);
 delay(1000);

 // for 3
 digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,1);
 digitalWrite(f,1);
 digitalWrite(g,0);
 delay(1000);

 // for 4
 digitalWrite(a,1);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,1);
 digitalWrite(e,1);
 digitalWrite(f,0);
 digitalWrite(g,0);
 delay(1000);

 // for 5
  digitalWrite(a,0);
 digitalWrite(b,1);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,1);
 digitalWrite(f,0);
 digitalWrite(g,0);
 delay(1000);

 // for 6
  digitalWrite(a,0);
 digitalWrite(b,1);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,0);
 digitalWrite(f,0);
 digitalWrite(g,0);
 delay(1000);

 // for 7
  digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,1);
 digitalWrite(e,1);
 digitalWrite(f,1);
 digitalWrite(g,1);
 delay(1000);

 // for 8
  digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,0);
 digitalWrite(f,0);
 digitalWrite(g,0);
 delay(1000);

 // for 9
  digitalWrite(a,0);
 digitalWrite(b,0);
 digitalWrite(c,0);
 digitalWrite(d,0);
 digitalWrite(e,1);
 digitalWrite(f,0);
 digitalWrite(g,0);
 delay(1000);

}