int pin1 = 15;
int pin2 = 2;
int pin4 = 4;
int pin6 = 5;
int pin7 = 19;
int pin8 = 22;
int pin10 = 32;

int pin12 = 12;
int pin15 = 13;

void setup() {
  pinMode(pin1, OUTPUT);
  pinMode(pin2, OUTPUT);
  pinMode(pin4, OUTPUT);
  pinMode(pin6, OUTPUT);
  pinMode(pin7, OUTPUT);
  pinMode(pin8, OUTPUT);
  pinMode(pin10, OUTPUT);
  pinMode(pin12, OUTPUT);
  pinMode(pin15, OUTPUT);
}

void loop() {
  digitalWrite(pin12, HIGH);

  int i = 0;
  while (true) {
    if (i == 10) i = 0;
    number(i);
    delay(1000);
    i++;
  }
}



void number(int n) {

  digitalWrite(pin10, HIGH);
  digitalWrite(pin1, HIGH);
  digitalWrite(pin2, HIGH);
  digitalWrite(pin4, HIGH);
  digitalWrite(pin6, HIGH);
  digitalWrite(pin7, HIGH);
  digitalWrite(pin8, HIGH);
  digitalWrite(pin10, HIGH);

  switch(n) {
    case 0:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      digitalWrite(pin7, LOW);
      digitalWrite(pin8, LOW);
      break;
    case 1:
      digitalWrite(pin2, LOW);
      digitalWrite(pin4, LOW);
      break;
    case 2:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin10, LOW);
      digitalWrite(pin7, LOW);
      digitalWrite(pin6, LOW);
      break;
    case 3:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin10, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      break;
    case 4:
      digitalWrite(pin8, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin10, LOW);
      digitalWrite(pin4, LOW);
      break;
    case 5:
      digitalWrite(pin1, LOW);
      digitalWrite(pin8, LOW);
      digitalWrite(pin10, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      break;
    case 6:
      digitalWrite(pin1, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      digitalWrite(pin7, LOW);
      digitalWrite(pin8, LOW);
      digitalWrite(pin10, LOW);
      break;
    case 7:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin4, LOW);
      break;
    case 8:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      digitalWrite(pin7, LOW);
      digitalWrite(pin8, LOW);
      digitalWrite(pin10, LOW);
      break;
    case 9:
      digitalWrite(pin1, LOW);
      digitalWrite(pin2, LOW);
      digitalWrite(pin4, LOW);
      digitalWrite(pin6, LOW);
      digitalWrite(pin8, LOW);
      digitalWrite(pin10, LOW);
      break;

  }
}