// Display 0 to 9999 in loop with dealy
// work done 02-03-24
void setup() {
  #define MAX 10
  

  // put your setup code here, to run once:
  volatile char *dirf,*dirk,*dira,*dirc;
  volatile char *outf,*outk,*outa,*outc;
  volatile long a[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67};
  volatile long b[]={0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xE7};
  volatile long i,j=0,k=0,l=0,m=1,lop1=0,lop2=0,lop3=0;
  dirf=0xFF,dirk=0xFF,dira=0xFF,dirc=0xFF;
  dirf = 0x30; outf = 0x31; 
  dirk = 0x107; outk = 0x108;
  dira = 0x21; outa = 0x22;
  dirc = 0x27; outc = 0x28;

  for(i=0;i<10;i++)//0 to 9
  {
    *outc=a[i];
    delay(MAX);
  }
  //----------10 to 99-----------
  j=1;
  while(lop1<9)
  {
    
  for(i=0;i<10;i++)//10 to 99
  {
  *outc=a[i];
  *outa=a[j];
  delay(MAX);
  }
  j++;
  lop1++;
  }
  //------------100 to 999------------------
  j=0;
  k=1;
  while(lop2<9)
  {
    j=0;
    lop1=0;
  while(lop1<10)
  {
  for(i=0;i<10;i++)
  {
    *outc=a[i];
    *outa=a[j];
    *outk=a[k];
    delay(MAX);
  }
  lop1++;
  j++;
  }
  lop2++;
  k++;
 }
 //---------------------999 to 9999-------------------
 l=1;
 k=0;
 j=0;
 lop1=0;
 lop2=0;
 while(lop3<9)
 {
  k=0;
  lop2=0;
 while(lop2<10)
 {
  j=0;
  lop1=0;
 while(lop1<10)
 {
 for(i=0;i<10;i++)
  {
    *outc=a[i];
    *outa=a[j];
    *outk=a[k];
    *outf=a[l];
    delay(MAX);
  }
  j++;
  lop1++;
 }
 k++;
 lop2++;
 }
 l++;
 lop3++;
 }
  
}
  

  

void loop() {
  // put your main code here, to run repeatedly:

}