int ledA = 2;
int ledB = 3;
int ledC = 4;
int ledD = 5;
int ledE = 6;
int ledF = 7;
int ledG = 8;
int Com1 = 9;
int Com2 = 10;
int satuan = 9;
int puluhan = 9;
int potensio = A7;
int hasil_baca;
int delaypot;

void setup() {
  pinMode(ledA, OUTPUT);
  pinMode(ledB, OUTPUT);
  pinMode(ledC, OUTPUT);
  pinMode(ledD, OUTPUT);
  pinMode(ledE, OUTPUT);
  pinMode(ledF, OUTPUT);
  pinMode(ledG, OUTPUT);
  pinMode(Com1, OUTPUT);
  pinMode(Com2, OUTPUT);
  pinMode(potensio, INPUT);
}

void satuan_segmen() {
  //no0
  if (satuan == 0) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 1);
  }

  //no1
  if (satuan == 1) {
    digitalWrite(ledA, 1);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 1);
  }

  //no2
  if (satuan == 2) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 1);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 0);
  }

  //no3
  if (satuan == 3) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 0);
  }

  //no4
  if (satuan == 4) {
    digitalWrite(ledA, 1);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no5
  if (satuan == 5) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 1);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no6
  if (satuan == 6) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 1);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no7
  if (satuan == 7) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 1);
  }

  //no8
  if (satuan == 8) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //n09
  if (satuan == 9) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }
}

void puluhan_segmen() {
  //no0
  if (puluhan == 0) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 1);
  }

  //no1
  if (puluhan == 1) {
    digitalWrite(ledA, 1);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 1);
  }

  //no2
  if (puluhan == 2) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 1);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 0);
  }

  //no3
  if (puluhan == 3) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 0);
  }

  //no4
  if (puluhan == 4) {
    digitalWrite(ledA, 1);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no5
  if (puluhan == 5) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 1);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no6
  if (puluhan == 6) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 1);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //no7
  if (puluhan == 7) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 1);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 1);
    digitalWrite(ledG, 1);;
  }

  //no8
  if (puluhan == 8) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 0);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }

  //n09
  if (puluhan == 9) {
    digitalWrite(ledA, 0);
    digitalWrite(ledB, 0);
    digitalWrite(ledC, 0);
    digitalWrite(ledD, 0);
    digitalWrite(ledE, 1);
    digitalWrite(ledF, 0);
    digitalWrite(ledG, 0);
  }
}

void matikan() {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 1);
}

void ulangan() {
  for (int ulang = 0; ulang <= delaypot; ulang++) {
    digitalWrite(Com1, 1);
    digitalWrite(Com2, 0); //satuan
    satuan_segmen();
    delay(1);
    matikan();
    digitalWrite(Com1, 0);
    digitalWrite(Com2, 1); //puluhan
    puluhan_segmen();
    delay(1);
    matikan();
  }
}

void loop() {
  baca_pot();
  ulangan();
  satuan--;
  if (satuan < 0) {
    satuan = 9;
    puluhan--;
  }
  if (puluhan < 0) {
    puluhan = 0;
    satuan = 0;
  }
}


void baca_pot() {
  int val = analogRead(potensio);
  val = map(val, 0, 1023, 1000, 200);
  delaypot = val / 2;
  //satuan = val % 10;
  //puluhan = ((val-satuan)/10);
}