void setup() {
  // put your setup code here, to run once:
volatile char*dirf;
dirf=0x30;
volatile char*outf;
outf=0x31;
// *outf=0x01;
}

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

volatile char i;
  volatile long m;
volatile char*outf;

outf=0x31;


*outf=0x01;
for(m=0;m< 200000;m++);
*outf=0x02;
for(m=0;m< 200000;m++);

}
/*
3. Glow 0 to 7 LEDs with delay and 7 to 0 LEDs with delay

char a=0x00 ,b;
for( i=0;i<8;i++){
  b=( ( a << 1) | 0x01);
      a=b;
*outf=a;

  for(m=0;m< 200000;m++);
}

*outf=0x00;
  for(m=0;m< 200000;m++);
char c=0x80,e; 
for( i=0;i<7;i++){
  e= ( c >> 1) ;
    c=e;
*outf=c;
  for(m=0;m< 200000;m++);
}
}

/* 1. Glow the LEDs in following order
3,7 delay – 2,6 delay – 1,5 delay – 0,4 delay
 *outf=0x88;
  for(m=0;m< 500000;m++);
*outf=0x00;
  for(m=0;m< 500000;m++);

  *outf=0x44;
    for(m=0;m< 500000;m++);
  *outf=0x00;


*outf=0x22;
    for(m=0;m< 500000;m++);
  *outf=0x00;

/*/