#define DELAY 99999
void setup() {
  // put your setup code here, to run once:
  volatile long i,j,k;
  volatile char *dirf,*outf,val;
  volatile char *dira,*outa;
  dirf=0x30;outf=0x31;
  dira=0x21;outa=0x22;
  *dirf=0x1f;
  *dira=0x1f;
  while(1){
  for(j=0;j<5;j++){
  for(k=0;k<5;k++){
  val=0xe1<<k;
  *outf=0x01<<j;
  *outa=~val;
  for(i=0;i<100000;i++);
  }
  
  }
  
  }
 

 


}

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



  
  


}