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И меется код из данной статьи:http://robocraft.ru/blog/arduino/782.html , выводящий сторку ,хотелось бы иметь возможнось менять направление движение строки

#include <FrequencyTimer2.h>
#define SPACE { \
    {0, 0, 0, 0, 0, 0, 0, 0},  \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0}, \
    {0, 0, 0, 0, 0, 0, 0, 0} \
}
#define H { \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 1, 1, 1, 1, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}  \
}
#define E  { \
    {0, 1, 1, 1, 1, 1, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 1, 1, 1, 1, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 1, 1, 1, 1, 1, 0}  \
}
#define L { \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 0, 0}, \
    {0, 1, 1, 1, 1, 1, 1, 0}  \
}
#define O { \
    {0, 0, 0, 1, 1, 0, 0, 0}, \
    {0, 0, 1, 0, 0, 1, 0, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 1, 0, 0, 0, 0, 1, 0}, \
    {0, 0, 1, 0, 0, 1, 0, 0}, \
    {0, 0, 0, 1, 1, 0, 0, 0}  \
}
byte col = 0;
byte leds[8][8];
// pin[xx] on led matrix connected to nn on Arduino (-1 is dummy to make array start at pos 1)
int pins[17]= {-1, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2};
// col[xx] of leds = pin yy on led matrix
int cols[8] = {pins[13], pins[3], pins[4], pins[10], pins[06], pins[11], pins[15], pins[16]};
// row[xx] of leds = pin yy on led matrix
int rows[8] = {pins[9], pins[14], pins[8], pins[12], pins[1], pins[7], pins[2], pins[5]};
const int numPatterns = 6;
byte patterns[numPatterns][8][8] = {
  H,E,L,L,O,SPACE
};
int pattern = 0;
void setup() {
// sets the pins as output
for (int i = 1; i <= 16; i++) {
pinMode(pins[i], OUTPUT);
  }
// set up cols and rows
for (int i = 1; i <= 8; i++) {
digitalWrite(cols[i - 1], HIGH);
  }
for (int i = 1; i <= 8; i++) {
digitalWrite(rows[i - 1], HIGH);
  }
clearLeds();
// Turn off toggling of pin 11
FrequencyTimer2::disable();
// Set refresh rate (interrupt timeout period)
FrequencyTimer2::setPeriod(2000);
// Set interrupt routine to be called
FrequencyTimer2::setOnOverflow(display);
setPattern(pattern);
}
void loop() {
    pattern = ++pattern % numPatterns;
slidePattern(pattern, 60);
}
void clearLeds() {
// Clear display array
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
      leds[i][j] = 0;
    }
  }
}
void setPattern(int pattern) {
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
      leds[i][j] = patterns[pattern][i][j];
    }
  }
}



void slidePattern(int pattern, int del) {
for (int l = 0; l < 8; l++) {
for (int i = 0; i < 7; i++) {
for (int j = 0; j < 8; j++) {
        leds[j][i] = leds[j][i+1];
      }
    }
for (int j = 0; j < 8; j++) {
      leds[j][7] = patterns[pattern][j][0 + l];
    }
delay(del);
  }
}


// Interrupt routine
void display() {
digitalWrite(cols[col], HIGH);  // Turn whole previous column off
  col++;
if (col == 8) {
    col = 0;
  }
for (int row = 0; row < 8; row++) {
if (leds[col][7 - row] == 1) {
digitalWrite(rows[row], HIGH);  // Turn on ƒthis led
    }
else {
digitalWrite(rows[row], LOW); // Turn off this led
    }
  }
digitalWrite(cols[col], LOW); // Turn whole column on at once (for equal lighting times)
}