#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);
}

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

  //8
  digitalWrite(e, HIGH);
  delay(1000);

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

  //6
  digitalWrite(b, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  delay(1000);

  //5
  digitalWrite(e, LOW);
  delay(1000);
  
  //4
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(d, LOW);
  delay(1000);
  
  //3
  digitalWrite(a, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
  delay(1000);

  //2
  digitalWrite(e, HIGH);
  digitalWrite(c, LOW);
  delay(1000);
  
  //1
  digitalWrite(a, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(g, LOW);
  delay(1000);

  //0
  digitalWrite(a, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  delay(1000);
}