//volatile char *dirf,*dirk,*outf,*outk;
#define DELAY 10000
void setup() {
  volatile char *dirf=0x30,*dirk=0x107,*outf=0x31,*outk=0x108;
  *dirf=0xFF,*dirk=0xFF;

  char digit[] = {0b00000001, 0b00000010, 0b00000100, 
                  0b00001000, 0b00010000, 0b00100000, 
                  0b01000000, 0b10000000};

  char cntl[] =  {0b11111110, 0b11111101, 0b11111011, 
                  0b11110111, 0b11101111, 0b11011111, 
                  0b10111111, 0b01111111};

 // *outf = digit[0]; // Assuming the top-left LED is connected to the first pin in the row
 // *outk = cntl[0];
int i=0;
    while(i<50){
      for(volatile int k=0;k<8;k++){
        *outf=digit[k];
        *outk=cntl[k];
        delay(5);
        *outk=0xFF;
      }
    }

  }

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

}