int pin_a = 13;
int pin_b = 12;
int pin_c = 11;
int pin_d = 10;
int pin_e = 9;
int pin_f = 8;
int pin_g = 7;
int counter = 0;
int btn = 6;
int button_state, button_old_state;
int dig1 = 2;
int dig2 = 4;
void setup() {
  pinMode(pin_a, OUTPUT);
  pinMode(pin_b, OUTPUT);
  pinMode(pin_c, OUTPUT);
  pinMode(pin_d, OUTPUT);
  pinMode(pin_e, OUTPUT);
  pinMode(pin_f, OUTPUT);
  pinMode(pin_g, OUTPUT);
  pinMode(dig1, OUTPUT);
  pinMode(dig2, OUTPUT);
  pinMode(btn, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  button_state = !digitalRead(btn);
  
  if(button_state == 1 && button_old_state == 0){
    counter++;
    Serial.println(counter);
    counter = counter % 31;
  }
  else{
    delay(50);
  }
  button_old_state = button_state;

  if(counter == 0){
    zero();
  }
    else if (counter == 1){
      one();
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
    }
     else if (counter == 2){
      two();
    }
     else if (counter == 3){
      three();
    }
     else if (counter == 4){
      four();
    }
     else if (counter == 5){
      five();
    }
     else if (counter == 6){
      six();
    }
    else if (counter == 7){
      seven();
    }
     else if (counter == 8){
      eight();
    }
     else if (counter == 9){
      nine();
    }
     else if (counter == 10){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      zero();
      delay(10);
      clear();
      delay(10);
    }
    else if (counter == 11){

      one();
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, LOW);
    }
     else if (counter == 12){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);

      
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      two();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 13){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      three();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 14){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      four();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 15){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      five();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 16){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      six();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 17){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      seven();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 18){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      eight();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 19){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      one();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      nine();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 20){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      zero();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 21){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      one();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 22){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, LOW);
      two();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 23){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      three();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 24){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      four();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 25){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      five();
      delay(10);
      clear();
      delay(10);
    }
      else if (counter == 26){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      six();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 27){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      seven();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 28){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      eight();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 29){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      two();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      nine();
      delay(10);
      clear();
      delay(10);
    }
     else if (counter == 30){
      
      digitalWrite(dig1, LOW);
      digitalWrite(dig2, HIGH);
      three();
      delay(10);
      clear();
      delay(10);
      digitalWrite(dig1, HIGH);
      digitalWrite(dig2, LOW);
      zero();
      delay(10);
      clear();
      delay(10);
    }
  }

void clear(){
  digitalWrite(pin_a, LOW);
  digitalWrite(pin_b, LOW);
  digitalWrite(pin_c, LOW);
  digitalWrite(pin_d, LOW);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, LOW);
  digitalWrite(pin_g, LOW);
}
  
void zero(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, HIGH);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, LOW);
}
void one(){
  digitalWrite(pin_a, LOW);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, LOW);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, LOW);
  digitalWrite(pin_g, LOW);
}
void two(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, LOW);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, HIGH);
  digitalWrite(pin_f, LOW);
  digitalWrite(pin_g, HIGH);
}
void three(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, LOW);
  digitalWrite(pin_g, HIGH);
}
void four(){
  digitalWrite(pin_a, LOW);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, LOW);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, HIGH);
}
void five(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, LOW);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, HIGH);
}
void six(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, LOW);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, HIGH);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, HIGH);
}
void seven(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, LOW);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, LOW);
  digitalWrite(pin_g, LOW);
}
void eight(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, HIGH);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, HIGH);
}
void nine(){
  digitalWrite(pin_a, HIGH);
  digitalWrite(pin_b, HIGH);
  digitalWrite(pin_c, HIGH);
  digitalWrite(pin_d, HIGH);
  digitalWrite(pin_e, LOW);
  digitalWrite(pin_f, HIGH);
  digitalWrite(pin_g, HIGH);
}