#include <LedControl.h>

LedControl lc = LedControl(9, 11, 10, 1); 

const int displayNumber = 0;

byte letters[9][8] = {
  {0b00000000, 0b01000010, 0b01000010, 0b01111110, 0b01000010, 0b01000010, 0b00111100, 0b00000000}, // A
  {0b00000000, 0b01111100, 0b01000010, 0b01000010, 0b01111100, 0b01000010, 0b01111100, 0b00000000}, // B
  {0b00000000, 0b00111100, 0b01000010, 0b01000000, 0b01000000, 0b01000010, 0b00111100, 0b00000000}, // C
  {0b00000000, 0b01111000, 0b01000100, 0b01000100, 0b01000100, 0b01000100, 0b01111000, 0b00000000}, // D
  {0b00000000, 0b01111110, 0b01000000, 0b01111100, 0b01000000, 0b01000000, 0b01111110, 0b00000000}, // E
  {0b00000000, 0b01000000, 0b01000000, 0b01000000, 0b01110000, 0b01000000, 0b01111110, 0b00000000}, // F
  {0b00000000, 0b00111100, 0b01000010, 0b01001110, 0b01000000, 0b01000010, 0b00111100, 0b00000000}, // G
  {0b00000000, 0b01000010, 0b01000010, 0b01111110, 0b01000010, 0b01000010, 0b01000010, 0b00000000}, // H
  {0b00000000, 0b01111100, 0b00010000, 0b00010000, 0b00010000, 0b00010000, 0b01111100, 0b00000000}, // I
};
byte rotatedLetters[9][8];

void setup() {
  lc.shutdown(displayNumber, false);       
  lc.setIntensity(displayNumber, 15);
  lc.clearDisplay(displayNumber);            
  
  for (int i = 0; i < 9; i++) {
    for (int row = 0; row < 8; row++) {
      rotatedLetters[i][row] = reverseBits(letters[i][7 - row]); 
    }
  }
}

void loop() {
  for (int letter = 0; letter < 9; letter++) {
    lc.clearDisplay(0); 
    for (int row = 0; row < 8; row++) {
      lc.setRow(0, row, rotatedLetters[letter][row]); 
    }
    delay(1000);        
  }
}

byte reverseBits(byte b) {
  byte reversed = 0;
  for (int i = 0; i < 8; i++) {
    reversed = (reversed << 1) | (b & 1);
    b >>= 1;
  }
  return reversed;
}