void setup() {
  // put your setup code here, to run once:
  volatile char *dir,*dir2;
  dir=0x30;
  *dir=0xFF;
  dir2=0x107;
  *dir2=0xFF;

}

void loop() {
  // put your main code here, to run repeatedly:
   const char digits[10] = {
    0b00111111,
    0b00000110, // 1
    0b01011011, // 2
    0b01001111, // 3
    0b01100110, // 4
    0b01101101, // 5
    0b01111101, // 6
    0b00000111, // 7
    0b01111111, // 8
    0b01101111  // 9
    };

  volatile char *out, *out2;
  out = (volatile char *) 0x31; // 0x31 is F PORT register
  out2=0x108;

  // Loop through digits 1 to 9 and display on 7-segment
  for (int i = 0; i <=9; i++) {
    *out = digits[i];  // Send the binary pattern to display the digit
    
    for(int j=0; j<=9;j++){
        *out2=digits[j];
        delay(1000);  
    }
         // Delay for 1 second to keep the digit visible
     *out2=digits[0];
  }
}