#define PB_UP 13
#define PB_DOWN 12
#define PB_RESET 11
//7 Segments
#define SEGMENT_A 2
#define SEGMENT_B 3
#define SEGMENT_C 4
#define SEGMENT_D 5
#define SEGMENT_E 6
#define SEGMENT_F 7
#define SEGMENT_G 8

int value = 0;

void setup() {
  Serial.begin(9600);
  pinMode(SEGMENT_A, OUTPUT);
  pinMode(SEGMENT_B, OUTPUT);
  pinMode(SEGMENT_C, OUTPUT);
  pinMode(SEGMENT_D, OUTPUT);
  pinMode(SEGMENT_E, OUTPUT);
  pinMode(SEGMENT_F, OUTPUT);
  pinMode(SEGMENT_G, OUTPUT);
  pinMode(PB_UP, INPUT);
  pinMode(PB_DOWN, INPUT);
  pinMode(PB_RESET, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(PB_UP) == 0 && value < 9) {
    while(digitalRead(PB_UP) == 0) {}
    value += 1;
  }
  if (digitalRead(PB_DOWN) == 1 && value > 0) {
    delay(300);
    value -= 1;
  }
  if (digitalRead(PB_RESET) == 0) {
    delay(300);
    value = 0;
  }
  displayDIGIT(value);
  Serial.println(value);
}

void displayDIGIT(int angka) {
  switch (angka) {
    case 1:
      digitalWrite(SEGMENT_A, 1);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 1);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 1);
      digitalWrite(SEGMENT_G, 1);
      break;
    case 2:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 1);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 0);
      digitalWrite(SEGMENT_F, 1);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 3:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 1);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 4:
      digitalWrite(SEGMENT_A, 1);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 1);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 5:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 1);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 6:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 1);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 0);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 7:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 1);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 1);
      digitalWrite(SEGMENT_G, 1);
      break;
    case 8:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 0);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 0);
      break;
    case 9:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 1);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 0);
      break;
    default:
      digitalWrite(SEGMENT_A, 0);
      digitalWrite(SEGMENT_B, 0);
      digitalWrite(SEGMENT_C, 0);
      digitalWrite(SEGMENT_D, 0);
      digitalWrite(SEGMENT_E, 0);
      digitalWrite(SEGMENT_F, 0);
      digitalWrite(SEGMENT_G, 1);
      break;
  }
}