int seg_a = 3; //
int seg_b = 2; //
int seg_c = 8; //
int seg_d = 7; //
int seg_e = 6; //
int seg_f = 4; //
int seg_g = 5; //
int btn = 10;
int value = 0;
int buttonPulledUp = 0;
int lastState = 0;

void setup() {
  //Serial.begin(9600);
  pinMode( seg_a, OUTPUT );
  pinMode( seg_b, OUTPUT );
  pinMode( seg_c, OUTPUT );
  pinMode( seg_d, OUTPUT );
  pinMode( seg_e, OUTPUT );
  pinMode( seg_f, OUTPUT );
  pinMode( seg_g, OUTPUT );
  pinMode( btn, INPUT_PULLUP);
  digitalWrite(seg_a, HIGH );
  digitalWrite(seg_b, HIGH );
  digitalWrite(seg_c, HIGH );
  digitalWrite(seg_d, HIGH );
  digitalWrite(seg_e, HIGH );
  digitalWrite(seg_f, HIGH );
  //digitalWrite(seg_g, HIGH );
}

void shut() {
  digitalWrite(seg_a, LOW );
  digitalWrite(seg_b, LOW );
  digitalWrite(seg_c, LOW );
  digitalWrite(seg_d, LOW );
  digitalWrite(seg_e, LOW );
  digitalWrite(seg_f, LOW );
  digitalWrite(seg_g, LOW );
}

void outp(int value) {
  switch (value) {
    case 9:
      shut();
      digitalWrite(seg_a, HIGH ); //8

      break;
    case 8:
      shut();
      digitalWrite(seg_b, HIGH ); //8

      break;
    case 7:
      shut();
      digitalWrite(seg_c, HIGH ); //7

      break;
    case 6:
      shut();
      digitalWrite(seg_d, HIGH ); //6

      break;
    case 5:
      shut();
      digitalWrite(seg_e, HIGH ); //5

      break;
    case 4:
      shut();
      digitalWrite(seg_f, HIGH ); //4

      break;

  }
}

void loop() {
  buttonPulledUp = digitalRead(btn);
  if (buttonPulledUp != lastState) {
    if (!buttonPulledUp) {
      value += 1;
      outp(value);
      delay(500);
      buttonPulledUp = !buttonPulledUp;
    }
  }
  if (value == 9)
    value = -1;

  lastState = buttonPulledUp;
}