void setup() {
  volatile char *dirf,*dirk,*dira,*dirc,*outa,*outc,*outf,*ink,i;
  volatile long j;

  dirf=0x30;dirk=0x107;dira=0x21;dirc=0x27;
  *dirf=0x00;*dirk=0x00;*dira=0x0f;*dirc=0x0f;
  outf=0x31;ink=0x106;outa=0x22;outc=0x28;
  int arr[10]={0x3f,0x06,0x5b,0x4f,0x64,0x6d,0x7d,0x07,0x7f,0x6f};
  int pink[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
  while(1)
  {
    for(i=0;i<4;i++)
    {
      *outf=1<<i;
      *outa=arr[*ink];
      if(*ink!=0)
      {
        *outc=arr[i+1];
        for(j=1;j<500000;j++);
        *outc=0;
      }
    }
  }
}
void loop() {
}