#include "RTClib.h"
RTC_DS1307 rtc;

// Контакты
int a = 13;int b = A1;int c = 2;int d = 3;
int e = 4;int f = 5;int g = 6;int dp = 7;
int d1 =8; int d2 =9; int d3 =10; int d4 =11;
int cln=12;

// Алгоритм
void setup() {
Serial.begin(9600);
rtc.begin();
}
void loop() {
  DateTime now = rtc.now();
  ledon(cln);
  dig(d1, now.hour()/10);
  dig(d2, now.hour()%10);
  dig(d3, now.minute()/10);
  dig(d4, now.minute()%10);
}

// Функции
void dig(int x,int y){
  ledoff(x);
  number(y);
  delay(3);
  ledwipe();
  ledon(x);
}

void ledoff(int x) {
  pinMode(x, OUTPUT);
  digitalWrite(x, HIGH);
}

void ledon(int x) {
  pinMode(x, OUTPUT);
  digitalWrite(x, LOW);
}

void dot() {
  ledon(dp);
}

void ledwipe(){
  ledoff(a);
  ledoff(b);
  ledoff(c);
  ledoff(d);
  ledoff(e);
  ledoff(f);
  ledoff(g);
  ledoff(dp);
}
void number (int x){
  if (x == 0){
  ledon(a);
  ledon(b);
  ledon(c);
  ledon(d);
  ledon(e);
  ledon(f);
  }
  if (x == 1){
    ledon(b);
    ledon(c);
  }
    if (x == 2){
      ledon(a);
      ledon(b);
      ledon(g);
      ledon(e);
      ledon(d);
    }
      if (x == 3){
        ledon(a);
        number(1);
        ledon(d);
        ledon(g);
      }
        if (x == 4){
          number(1);
          ledon(f);
          ledon(g);
        }
          if (x == 5){
            ledon(a);
            ledon(f);
            ledon(g);
            ledon(c);
            ledon(d);
          }
            if (x == 6){
              ledon(a);
              ledon(f);
              ledon(g);
              ledon(c);
              ledon(d);
              ledon(e);
            }
              if (x == 7){
                ledon(a);
                number(1);
              }
              if (x == 8){
                number(9);
                ledon(e);
                }
                if (x == 9){
                  number(5);
                  ledon(b);
                }
}