//common cathode
int a = 13, b = 12, c = 11, d = 10, e = 9, f = 8, g = 7;

void sS(int aW, int bW, int cW, int dW, int eW, int fW, int gW) {
  digitalWrite(a, aW);
  digitalWrite(b, bW);
  digitalWrite(c, cW);
  digitalWrite(d, dW);
  digitalWrite(e, eW);
  digitalWrite(f, fW);
  digitalWrite(g, gW);
}

void print1() {
  sS(0, 1, 1, 0, 0, 0, 0);
}
void print2() {
  sS(1, 1, 0, 1, 1, 0, 1);
}
void print3() {
  sS(1, 1, 1, 1, 0, 0, 1);
}
void print4() {
  sS(0, 1, 1, 0, 0, 1, 1);
}
void print5() {
  sS(1, 0, 1, 1, 0, 1, 1);
}
void print6() {
  sS(1, 0, 1, 1, 1, 1, 1);
}
void print7() {
  sS(1, 1, 1, 0, 0, 0, 0);
}
void print8() {
  sS(1, 1, 1, 1, 1, 1, 1);
}
void print9() {
  sS(1, 1, 1, 1, 0, 1, 1);
}
void print0() {
  sS(1, 1, 1, 1, 1, 1, 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);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000);
  print0();
  delay(1000);
  print1();
  delay(2 * 500);
  print2();
  delay(2 * 500);
  print3();
  delay(2 * 500);
  print4();
  delay(2 * 500);
  print5();
  delay(2 * 500);
  print6();
  delay(2 * 500);
  print7();
  delay(2 * 500);
  print8();
  delay(2 * 500);
  print9();
  delay(4 * 500);
}