#define a 2 //segment ‘a’ di pin digital 2 
#define b 3
#define c 4
#define d 5
#define e 6
#define f 7
#define g 8

#define dig1 9
#define dig2 10
#define dig3 11
#define dig4 12

int nilai;
int ribuan, ratusan, puluhan, satuan;


void setup() {
  Serial.begin(9600);
  pinMode (a, OUTPUT);
  pinMode (b, OUTPUT);
  pinMode (c, OUTPUT);
  pinMode (d, OUTPUT);
  pinMode (e, OUTPUT);
  pinMode (f, OUTPUT);
  pinMode (g, OUTPUT);

  pinMode (dig1, OUTPUT);
  pinMode (dig2, OUTPUT);
  pinMode (dig3, OUTPUT);
  pinMode (dig4, OUTPUT);
}

void tampil (int angka) {
  // menampilkan angka 0
  if (angka == 0) {
    digitalWrite (a, 0); // karena seven segment common anode maka aktif LOW
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 0);
    digitalWrite (f, 0);
    digitalWrite (g, 1);
  }

  // menampilkan angka 1
  if (angka == 1) {
    digitalWrite (a, 1);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 1);
    digitalWrite (e, 1);
    digitalWrite (f, 1);
    digitalWrite (g, 1);
  }
  // menampilkan angka 2
  if (angka == 2) {
    digitalWrite (a, 0);
    digitalWrite (b, 0);
    digitalWrite (c, 1);
    digitalWrite (d, 0);
    digitalWrite (e, 0);
    digitalWrite (f, 1);
    digitalWrite (g, 0);
  }
  // menampilkan angka 3
  if (angka == 3) {
    digitalWrite (a, 0);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 1);
    digitalWrite (f, 1);
    digitalWrite (g, 0);
  }

  // menampilkan angka 4
  if (angka == 4) {
    digitalWrite (a, 1);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 1);
    digitalWrite (e, 1);
    digitalWrite (f, 0);
    digitalWrite (g, 0);
  }

  // menampilkan angka 5
  if (angka == 5) {
    digitalWrite (a, 0);
    digitalWrite (b, 1);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 1);
    digitalWrite (f, 0);
    digitalWrite (g, 0);
  }

  // menampilkan angka 6
  if (angka == 6) {
    digitalWrite (a, 0);
    digitalWrite (b, 1);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 0);
    digitalWrite (f, 0);
    digitalWrite (g, 0);
  }

  // menampilkan angka 7
  if (angka == 7) {
    digitalWrite (a, 0);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 1);
    digitalWrite (e, 1);
    digitalWrite (f, 1);
    digitalWrite (g, 1);
  }

  // menampilkan angka 8
  if (angka == 8) {
    digitalWrite (a, 0);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 0);
    digitalWrite (f, 0);
    digitalWrite (g, 0);
  }

  // menampilkan angka 9
  if (angka == 9) {
    digitalWrite (a, 0);
    digitalWrite (b, 0);
    digitalWrite (c, 0);
    digitalWrite (d, 0);
    digitalWrite (e, 1);
    digitalWrite (f, 0);
    digitalWrite (g, 0);
  }

}

void disMati (void) {
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, LOW);
}

void loop() {

  nilai = 2396;
  ribuan = (nilai/1000)%10;
  ratusan = (nilai/100)%10;
  puluhan = (nilai/10)%10;
  satuan = nilai%10;

  tampil(ribuan);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, LOW);
  delay(5);
  disMati();

  tampil(ratusan);
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, LOW);
  delay(5);
  disMati();

  tampil(puluhan);
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, LOW);
  delay(5);
  disMati();

  tampil(satuan);
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, HIGH);
  delay(5);
  disMati();
}