void setup() {
  // put your setup code here, to run once:
  volatile char *dir2; 
  dir2=0x30; //configured PORTK as output port
  *dir2=0xFF;//configured all the pins as output
  volatile char *dir1;
  dir1=0x107;//configured PORTF as output port
  *dir1=0xFF;//configured all the pins as output
}

void loop() {
  // put your main code here, to run repeatedly:
  volatile char *out2;
  out2=0x31; //configured Data register for PORTK
  volatile char *out1;
  out1=0x108; //configured Data register for PORTF
  int a[10]={0x3F,0x30,0x5B,0x4F,0x64,0x6D,0x7C,0x07,0xFF,0x67};//hex value for 0-9
  int b[10]={0x3F,0x30,0x5B,0x4F,0x64,0x6D,0x7C,0x07,0xFF,0x67};//hex value for 0-9
   
  for(int i=0;i<10;i++)// loop for one's position
  {
    *out1=a[i*1];
    *out2=0x3F;
    delay(1000);
    for(int j=1;j<=9;j++)// loop for ten's position
    {
      *out1=a[i];
      *out2=b[j];
     delay(1000);
    }
  }
}