int a = 6;
int b = 7;
int c = 9;
int d = 10;
int e = 11;
int f = 5;
int g = 4;
int dp = 8;
int time = 1000;
int pause_btn = 2;
int reset_btn = 3;

void setup() {
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(dp, OUTPUT);
  pinMode(pause_btn, INPUT);
  pinMode(reset_btn, INPUT);
  attachInterrupt(digitalPinToInterrupt(pause_btn), pause, RISING);
}

void loop() {
  displayZero();
  displayOne();
  displayTwo();
  displayThree();
  displayFour();
  displayFive();
  displaySix();
  displaySeven();
  displayEight();
  displayNine();
}

void pause() {
  while(!digitalRead(reset_btn)) {

  }
}

void clear() {
  //Serial.println(digitalRead(pause_btn));
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(dp, HIGH);
}

void displayZero() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  delay(time);
}

void displayOne() {
  clear();
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  delay(time);
}

void displayTwo() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displayThree() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displayFour() {
  clear();
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displayFive() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displaySix() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displaySeven() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  delay(time);
}

void displayEight() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(time);
}

void displayNine() {
  clear();
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  delay(time);
}