POV code not working

this first post here , first real arduino project

ok wrote code make pov
i borrowed letter index user
dopeyalan
which appreciate much
it saved me lot of time

currently arduino lights first code letter 'h'
which 01110111
but stops there appreciate offer

quote

const int ledcount = 8;    // number of leds in pov

boolean col[8]={
 0,0,0,0,0,0,0,0};//binary hex binary conversion
int letters[][5] = {              //begin letter hex index
 {
   0x7e, 0x09, 0x09, 0x09, 0x7e  }
 , //a
 {
   0x7f, 0x49, 0x49, 0x49, 0x36  }
 , //b
 {
   0x3e, 0x41, 0x41, 0x41, 0x22  }
 , //c
 {
   0x7f, 0x41, 0x41, 0x22, 0x1c  }
 , //d
 {
   0x7f, 0x49, 0x49, 0x49, 0x49  }
 , //e
 {
   0x7f, 0x09, 0x09, 0x09, 0x09  }
 , //f
 {
   0x7e, 0x41, 0x49, 0x49, 0x38  }
 , //g
 {
   0x7f, 0x08, 0x08, 0x08, 0x7f  }
 , //h
 {
   0x00, 0x41, 0x7f, 0x41, 0x00  }
 , //i
 {
   0x30, 0x40, 0x41, 0x7f, 0x01  }
 , //j
 {
   0x7f, 0x08, 0x14, 0x22, 0x41  }
 , //k
 {
   0x7f, 0x40, 0x40, 0x40, 0x40  }
 , //l
 {
   0x7f, 0x02, 0x04, 0x02, 0x7f  }
 , //m
 {
   0x7f, 0x02, 0x0c, 0x10, 0x7f  }
 , //n
 {
   0x3e, 0x41, 0x41, 0x41, 0x3e  }
 , //o
 {
   0x1e, 0x21, 0x21, 0x21, 0x5e  }
 , //q
 {
   0x7f, 0x09, 0x19, 0x29, 0x46  }
 , //r
 {
   0x26, 0x49, 0x49, 0x49, 0x32  }
 , //s
 {
   0x01, 0x01, 0x7f, 0x01, 0x01  }
 , //t
 {
   0x3f, 0x40, 0x40, 0x40, 0x3f  }
 , //u
 {
   0x07, 0x38, 0x40, 0x38, 0x07  }
 , //v
 {
   0x3f, 0x40, 0x3f, 0x40, 0x3f  }
 , //w
 {
   0x63, 0x14, 0x08, 0x14, 0x63  }
 , //x
 {
   0x07, 0x08, 0x70, 0x08, 0x07  }
 , //y
 {
   0x61, 0x51, 0x49, 0x45, 0x43  } //z  



};//end letter hex index/
int ledpins[] = {
 2, 3, 4, 5, 6, 7,8 ,9};  //pin numbers leds



void bincon(int num){           //binary conversion
 int count=0;         //counter 1 or 0 gets put in correct place in col array
 for(int i=128; >=1; i/= 2){ //for loop binary integer subtracting 128,64,32,16,8,4,2,or 1 number , seeing if above 0

   num -= i;
   if (num  >=0){

     col[count]= 1;// puts 1 in col

   }
   else{
     num += i;
     col[count]= 0;//puts 0 in col

   }

   count++;

 }
}




void printletter(char letter){ //takes char , prints on leds
int letnum = int(letter); //converts char type integer
 for(int j=0;j<5;j++){ //for loop each hex  and change binary print it

   bincon(letters[letnum-65][j]); // changes hex calue index binary , puts in col string/array





   for (int i=0;i<8;i++){ //loop print col string/array leds

     if (col==1){
       digitalwrite(ledpins,high);
     }
     else{
       digitalwrite(ledpins,low);
     }

   }

 }

 delaymicroseconds(750);
}

void setup() {

 for (int thisled = 0; thisled < ledcount; thisled++) { // set pins output
   pinmode(ledpins[thisled], output);
 }
}







void loop() {




 printletter('h');
 printletter('i');

}

the first code of 'h' appears 0x7f, 01111111 according letters array.
i don't see wrong code (other slow). try putting serial.print of num @ start of bincon can verify intended values fetched.

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