#define a 3
#define b 4
#define c 5
#define d 6
#define e 7
#define f 8
#define g 9
#define dig1 10
#define dig2 11
#define dig3 12
#define dig4 13

void setup() {
   pinMode(a, OUTPUT);
   pinMode(b, OUTPUT);
   pinMode(c, OUTPUT);
   pinMode(d, OUTPUT);
   pinMode(e, OUTPUT);
   pinMode(f, OUTPUT);
   pinMode(g, OUTPUT);
   pinMode(dig1, OUTPUT);
   pinMode(dig2, OUTPUT);
   pinMode(dig3, OUTPUT);
   pinMode(dig4, OUTPUT);
}

void loop() {
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(1000);

  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  delay(1000);

  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, HIGH);
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  delay(1000);

  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, LOW);
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  delay(1000);
}