void setup() {
  // put your setup code here, to run once:
  volatile char *dirf;
  volatile char *outf;
  volatile long i;
  dirf =0x30;
*dirf =0xff;
outf =0x31;
while(1){
  //for(i=1;i<100000;i+=2){
    for(i=1;i<=8;i+=2){
      *outf=0x95 ;
    
   for(volatile long k=0;k<200000;k++);
    }
  }
}




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

}