int a = 2;
int b = 3;
int c = 4;
int d = 5;
int e = 6;
int f = 7;
int g = 8;

int one = 9;
int ten = 10;
int hund = 11;
int thou = 12;
int tetho = 13;
int hutho = A1;
int zobraz = 0;
unsigned long num = 0;
unsigned int cislo = 0;
unsigned int cislodesat = 0;
unsigned int cislodesat2 = 0;
unsigned int cislosto = 0;
unsigned int cislosto2 = 0;
unsigned int cislotisic = 0;
unsigned int cislotisic2 = 0;
unsigned int cislodesattisic = 0;
unsigned int cislodesattisic2 = 0;
unsigned int cislostotisic = 0;
unsigned int zobrazCislo = 0;
unsigned int intermid = 0;
unsigned int intermid2 = 0;
unsigned int intermid3 = 0;
unsigned int intermid4 = 0;
unsigned int intermid5 = 0;
unsigned long present2 = 0;
unsigned long past2 = 0;

void setup() {

  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);

  pinMode(one, OUTPUT);
  pinMode(ten, OUTPUT);
  pinMode(hund, OUTPUT);
  pinMode(thou, OUTPUT);
  pinMode(tetho, OUTPUT);
  pinMode(hutho, OUTPUT);

  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);

}

void loop() {
  present2 = micros();
  num = analogRead(A0) * 656.55896545;

  if (num > 9) {
    cislodesat = num / 10;
    cislosto = num / 100;
    cislotisic = num / 1000;
    cislodesattisic = num / 10000;
    cislostotisic = num / 100000;
    intermid = cislodesat * 10;
    intermid2 = cislosto * 10;
    intermid3 = cislotisic * 10;
    intermid4 = cislodesattisic * 10;
    intermid5 = cislostotisic * 10;
  }

  if (num <= 9) {
    cislodesat = 0;
    cislodesat2 = 0;
    cislosto = 0;
    cislosto2 = 0;
    cislotisic = 0;
    cislotisic2 = 0;
    cislodesattisic = 0;
    cislodesattisic2 = 0;
    cislostotisic = 0;
    cislo = num;
  }

  if (num > 9 && num <= 99) {
    cislodesat2 = cislodesat - intermid2;
    cislosto2 = cislosto - intermid3;
    cislotisic2 = cislotisic - intermid4;
    cislodesattisic2 = cislodesattisic - intermid5;
    cislo = num - intermid;
  }

  if (num > 99 && num <= 999) {
    cislodesat2 = cislodesat - intermid2;
    cislosto2 = cislosto - intermid3;
    cislotisic2 = cislotisic - intermid4;
    cislodesattisic2 = cislodesattisic - intermid5;
    cislo = num - intermid;
  }

  if (num >= 999) {
    cislodesat2 = cislodesat - intermid2;
    cislosto2 = cislosto - intermid3;
    cislotisic2 = cislotisic - intermid4;
    cislodesattisic2 = cislodesattisic - intermid5;
    cislo = num - intermid;
  }

  if (present2 - past2 >= 1000) {
    nezobraz();
    zobraz = zobraz + 1;

    switch (zobraz) {

      case 0:
        zobrazCislo = cislostotisic;
        zsts();
        break;

      case 1:
        zobrazCislo = cislodesattisic2;
        zdts();
        break;

      case 2:
        zobrazCislo = cislotisic2;
        ztis();
        break;

      case 3:
        zobrazCislo = cislosto2;
        zsto();
        break;

      case 4:
        zobrazCislo = cislodesat2;
        zdst();
        break;

      case 5:
        zobrazCislo = cislo;
        zjdn();
        break;

    }

    if (zobraz >= 6) {
      zobraz = -1;
    }

    past2 = present2;

  }

  switch (zobrazCislo) {

    case 0:
      z0();
      break;

    case 1:
      z1();
      break;

    case 2:
      z2();
      break;

    case 3:
      z3();
      break;

    case 4:
      z4();
      break;

    case 5:
      z5();
      break;

    case 6:
      z6();
      break;

    case 7:
      z7();
      break;

    case 8:
      z8();
      break;

    case 9:
      z9();
      break;

  }

}

void z1() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void z2() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}

void z3() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}

void z4() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z5() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z6() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z7() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void z8() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z9() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void z0() {
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}

void zjdn() {
  digitalWrite(one, LOW);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zdst() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, LOW);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zsto() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, LOW);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void ztis() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, LOW);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}

void zdts() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, LOW);
  digitalWrite(hutho, HIGH);
}

void zsts() {
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, LOW);
}

void nezobraz() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(one, HIGH);
  digitalWrite(ten, HIGH);
  digitalWrite(hund, HIGH);
  digitalWrite(thou, HIGH);
  digitalWrite(tetho, HIGH);
  digitalWrite(hutho, HIGH);
}