int a = 2;
int b = 3;
int c = 4;
int d = 5;
int e = 6;
int f = 7;
int g = 8;
int DP = 9;

int d1 = 10 ;
int d2 = 11 ;
int d3 = 12;
int d4 = 13;

unsigned long lasttime = 0;
unsigned int digitpos = 1;
//unsigned long lasttime = 0;
void setup() {
  // put your setup  code here, to run once:
  pinMode(a , OUTPUT);
  pinMode(b , OUTPUT);
  pinMode(c , OUTPUT);
  pinMode(d , OUTPUT);
  pinMode(e , OUTPUT);
  pinMode(f , OUTPUT);
  pinMode(g , OUTPUT);
  pinMode(DP , OUTPUT);
  pinMode(d1 , OUTPUT);
  pinMode(d2 , OUTPUT);
  pinMode(d3 , OUTPUT);
  pinMode(d4 , OUTPUT);
 Serial.begin(9600);



}

void loop() {
  unsigned long currenttime = millis();
  if (currenttime - lasttime >= 500) {
    lasttime = currenttime;
    digitpos++;
    if(digitpos > 4){
      digipos = 1;
    }
    Serial.println(digitpos);
  }
  // put your main code here, to run repeatedly:
     digitalWrite(d1, LOW);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, HIGH);
 showled(1);
 delay(1000);
     digitalWrite(d1, HIGH);
     digitalWrite(d2, LOW);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, HIGH);
 showled(2);
 delay(1000);
 digitalWrite(d1, HIGH);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, LOW);
     digitalWrite(d4, HIGH);
 showled(3);
 delay(1000);
 digitalWrite(d1, HIGH);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, LOW);
 showled(4);
 delay(1000);
 digitalWrite(d1, LOW);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, HIGH);
 showled(5);
 delay(1000);
 digitalWrite(d1, HIGH);
     digitalWrite(d2, LOW);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, HIGH);
 showled(6);
 delay(1000);
 digitalWrite(d1, HIGH);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, LOW);
     digitalWrite(d4, HIGH);
 showled(7);
 delay(1000);
 digitalWrite(d1, HIGH);
     digitalWrite(d2, HIGH);
     digitalWrite(d3, HIGH);
     digitalWrite(d4, LOW);
 showled(8);
 delay(1000);
 digitalWrite(d1, LOW);
     digitalWrite(d2, LOW);
     digitalWrite(d3, LOW);
     digitalWrite(d4, LOW);
 showled(9);
 delay(1000);

 Serial.println(1);
}

void showled (int digit) {
     if (digit == 0){
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , HIGH);
  digitalWrite(e , HIGH);
  digitalWrite(f , HIGH);
  digitalWrite(g , LOW);
  digitalWrite(DP , LOW);
  }else if (digit == 1){
  digitalWrite(a , LOW);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , LOW);
  digitalWrite(e , LOW);
  digitalWrite(f , LOW);
  digitalWrite(g , LOW);
  digitalWrite(DP , LOW);
  }  else if (digit == 2) {
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , LOW);
  digitalWrite(d , HIGH);
  digitalWrite(e , HIGH);
  digitalWrite(f , LOW);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  } else if (digit == 3) {
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , HIGH);
  digitalWrite(e , LOW);
  digitalWrite(f , LOW);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
  else if (digit == 4) {
  digitalWrite(a , LOW);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , LOW);
  digitalWrite(e , LOW);
  digitalWrite(f , HIGH);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
  else if (digit == 5) {
  digitalWrite(a , HIGH);
  digitalWrite(b , LOW);
  digitalWrite(c , HIGH);
  digitalWrite(d , HIGH);
  digitalWrite(e , LOW);
  digitalWrite(f , HIGH);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
  else if (digit == 6) {
  digitalWrite(a , HIGH);
  digitalWrite(b , LOW);
  digitalWrite(c , HIGH);
  digitalWrite(d , HIGH);
  digitalWrite(e , HIGH);
  digitalWrite(f , HIGH);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
  else if (digit == 7) {
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , LOW);
  digitalWrite(e , LOW);
  digitalWrite(f , LOW);
  digitalWrite(g , LOW);
  digitalWrite(DP , LOW);
  }
  else if (digit == 8) {
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , HIGH);
  digitalWrite(e , HIGH);
  digitalWrite(f , HIGH);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
  else if (digit == 9) {
  digitalWrite(a , HIGH);
  digitalWrite(b , HIGH);
  digitalWrite(c , HIGH);
  digitalWrite(d , LOW);
  digitalWrite(e , LOW);
  digitalWrite(f , HIGH);
  digitalWrite(g , HIGH);
  digitalWrite(DP , LOW);
  }
}