#define DELAY 200000
void setup() 
{
  volatile char *dirf,*dirk;
  volatile char *outf,*outk;
  volatile long i;
  dirf=0x30;dirk=0x107;
  *dirf=0x03;*dirk=0x03;
  outf=0x31;outk=0x108;
  while(1)
  {
    *outf=0x01;*outk=0x01;
    for(i=0;i<DELAY;i++);
    *outf=0x01;*outk=0x02;
    for(i=0;i<DELAY;i++);
    *outf=0x02;*outk=0x02;
    for(i=0;i<DELAY;i++);
    *outf=0x02;*outk=0x01;
    for(i=0;i<DELAY;i++);
    
  }
 
}

void loop(){}