#include <SevSeg.h>

SevSeg sevseg;

byte numDigits = 4;
byte digitPins[] = { 2,3,12,13 };
byte segmentPins[] = { 7,6,5,10,11,8,9,4 };
byte hardwareConfig = COMMON_CATHODE;

int num;
int delaycount = 0;


bool prime(int n)
{
    if (n == 0 || n == 1)return 0;


    for (int i = 2; i * i <= n; i++)
    {

        if (n % i == 0)
            return 0;
    }
    return 1;
}




void setup() {
    sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins);
    num = -9;
    
     while(1)
     {
       delaycount++;
       if(delaycount==5000)
       {
         delaycount=0;
         num++;
       }
       sevseg.setNumber(num,-1);
     sevseg.refreshDisplay();
     if(num==0)break;
     }
     num=-9;
     while(1)
     {

       delaycount++;
       if(delaycount==5000)
       {
         delaycount=0;
         num++;
       }
       sevseg.setNumber(num,1);
     sevseg.refreshDisplay();
     if(num==0)break;
     }

   
    int leds[8] = { 7,6,5,10,11,8,9,4 };
    num = 0;
    int flag = 1;
    while (1)
    {


        if (prime(num)) {
            if (flag == 1)
            {

                delaycount++;
                if (delaycount == 5000)
                {
                    delaycount = 0;
                    flag = 2;

                }
                sevseg.setNumber(num, -1);
                sevseg.refreshDisplay();
            }
            if (flag == 2)
            {
                digitalWrite(13, LOW);
                flag = 3;
                for (int i = 0; i < 8; i++)
                {
                    digitalWrite(leds[i], 0);
                }
                delay(500);
            }
            if (flag == 3)
            {
                delaycount++;
                if (delaycount == 5000)
                {
                    delaycount = 0;
                    flag = 4;

                }
                sevseg.setNumber(num, -1);
                sevseg.refreshDisplay();
            }
            if (flag == 4)
            {
                digitalWrite(13, LOW);
                flag = 5;
                for (int i = 0; i < 8; i++)
                {
                    digitalWrite(leds[i], 0);
                }
                delay(500);
            }
            if (flag == 5)
            {
                delaycount++;
                if (delaycount == 5000)
                {
                    delaycount = 0;
                    flag = 6;

                }
                sevseg.setNumber(num, -1);
                sevseg.refreshDisplay();
            }
            if (flag == 6)
            {
                digitalWrite(13, LOW);
                flag = 7;
                for (int i = 0; i < 8; i++)
                {
                    digitalWrite(leds[i], 0);
                }
                delay(500);
            }
            if (flag == 7)
            {
                delaycount++;
                if (delaycount == 5000)
                {
                    delaycount = 0;
                    num++;
                    flag = 1;

                }
                sevseg.setNumber(num, -1);
                sevseg.refreshDisplay();
            }



        }






        else
        {
            delaycount++;
            if (delaycount == 5000)
            {
                delaycount = 0;
                num++;
            }
            sevseg.setNumber(num, -1);
            sevseg.refreshDisplay();
        }

        if (num == 21) {
            break;
        }
    }



}

void loop() {}