#define a 1
#define b 2
#define c 3
#define d 4
#define e 5
#define f 6
#define g 7
#define x 0

void setup() {
  // put your setup code here, to run once:
  pinMode(x, OUTPUT);
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);

  digitalWrite(x, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  // 9
  digitalWrite(e, HIGH);
  delay(1000);
  digitalWrite(e,LOW);

  // 8
  delay(1000);

  // 7
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  delay(1000);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);

  // 6
  digitalWrite(b, HIGH);
  delay(1000);
  digitalWrite(b, LOW);

  // 5
  digitalWrite(b, HIGH);
  digitalWrite(e, HIGH);
  delay(1000);
  digitalWrite(b, LOW);
  digitalWrite(e, LOW);

  // 4
  digitalWrite(a, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  delay(1000);
  digitalWrite(a, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);

  // 3
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  delay(1000);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);

  // 2
  digitalWrite(c, HIGH);
  digitalWrite(f, HIGH);
  delay(1000);
  digitalWrite(c, LOW);
  digitalWrite(f, LOW);

  // 1
  digitalWrite(a, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  delay(1000);
  digitalWrite(a, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);

  // 0
  digitalWrite(g, HIGH);
  delay(1000);
  digitalWrite(g,LOW);
}