void setup() {
  volatile char *dirf,*dirk;
  dirf=0x30;
  dirk=0x107;
  *dirf=0xff;
  *dirk=0x00;

}

void loop() {
volatile char *out, *inp;
volatile char a=0;
volatile long j;
volatile char arr[10]={0x3f, 0x06, 0x5b, 0x4f, 0x64, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
out=0x31;
inp=0x106;


a=*inp;
loop:switch(a){
  case 0x01:
  *out=arr[1];
  for(j=0;j<500000;j++);
  case 0x02:
  *out=arr[2];
  for(j=0;j<500000;j++);
  case 0x04:
  *out=arr[3];
  for(j=0;j<500000;j++);
  case 0x08:
  *out=arr[4];
  for(j=0;j<500000;j++);
  case 0x10:
  *out=arr[5];
  for(j=0;j<500000;j++);
  case 0x20:
  *out=arr[6];
  for(j=0;j<500000;j++);
  case 0x40:
  *out=arr[7];
  for(j=0;j<500000;j++);
  case 0x80:
  *out=arr[8];
  for(j=0;j<500000;j++);
  *out=arr[9];
  for(j=0;j<500000;j++);
  goto loop;
}
}