void setup() {
  // put your setup code here, to run once:
  volatile char *dirf=0x30,*dirk=0x107;;
  *dirf=0xff;
  *dirk=0xff;

}

void loop() {
  // put your main code here, to run repeatedly:
 volatile char num[10]={0x3f,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0X6F};
  volatile char alph[26]={0x77,0x7c,0x39,0x5e,0x79,0x71,0x7d,0x76,0x06,0x1e,0x38,0x54,0x5c,0x73,0x67,0x50,0x6d,0x78,0x3e,0x6e,0x5b};
  volatile char s[9]={0,1,2,4,8,16,32,64,128};
 volatile char *outf=0x31;
 volatile char *outk=0x108,i,j,n=0,m=0;
volatile long l;

for(i=0;i<=9;i++)
{
for(j=0;j<=9;j++)
{
*outf=num[i];
*outk=num[j];
for(l=1;l<=200000;l++);
}
}
}