#include <LedControl.h>

int DIN = 11;
int CS = 10;
int CLK = 13;
int isShown = false;

LedControl lc = LedControl(DIN, CLK, CS, 1);

void setup() {
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
}

byte letters[9][8] = {
  {0b00000000,
   0b00111110,
   0b01100110,
   0b01100110,
   0b01111110,
   0b01100110,
   0b01100110,
   0b00000000},
  {0b00000000,
   0b01111100,
   0b00110010,
   0b01111100,
   0b00110010,
   0b00110010,
   0b01111100,
   0b00000000},
  {0b00000000,
   0b00111110,
   0b01100110,
   0b01100000,
   0b01100000,
   0b01100110,
   0b00111110,
   0b00000000},
  {0b00000000,
   0b01111100,
   0b00110010,
   0b00110010,
   0b00110010,
   0b00110010,
   0b01111100,
   0b00000000},
  {0b00000000,
   0b01111110,
   0b01100000,
   0b01111100,
   0b01100000,
   0b01100000,
   0b01111110,
   0b00000000},
  {0b00000000,
   0b01111110,
   0b01100000,
   0b01111100,
   0b01100000,
   0b01100000,
   0b01100000,
   0b00000000},
  {0b00000000,
   0b00111110,
   0b01100110,
   0b01100000,
   0b01101110,
   0b01100110,
   0b00111110,
   0b00000000},
  {0b00000000,
   0b01100110,
   0b01100110,
   0b01100110,
   0b01111110,
   0b01100110,
   0b01100110,
   0b00000000},
  {0b00000000,
   0b00111110,
   0b00011000,
   0b00011000,
   0b00011000,
   0b00011000,
   0b00111110,
   0b00000000}
};

void displayLetter(int letterIndex) {
  for (int row = 0; row < 8; row++) {
    byte rowData = letters[letterIndex][row];
    for (int col = 0; col < 8; col++) {
      boolean isLedOn = bitRead(rowData, col);
      lc.setLed(0, row, col, isLedOn);
    }
  }
}

void loop() {
  if (isShown) return;
  for (int i = 0; i < 9; i++) {
    lc.clearDisplay(0); 
    delay(50);
    displayLetter(i);
    delay(1000);
  }
  isShown = true;
}