#include <LedControl.h>

// Pin configuration for MAX7219 module
const int DIN_PIN = 7;   // Data in
const int CLK_PIN = 6;   // Clock
const int CS_PIN = 5;    // Chip Select

LedControl lc = LedControl(DIN_PIN, CLK_PIN, CS_PIN, 1); // Only one MAX7219 module

void setup() {
  lc.shutdown(0, false); // Wake up the MAX7219 module
  lc.setIntensity(0, 8); // Set the brightness (0-15)
  lc.clearDisplay(0);    // Clear the display
}

void displayCharacter(byte pattern[], int startX, int startY) {
  for (int row = 0; row < 9; row++) {
    lc.setRow(0, row + startY, pattern[row] << startX);
  }
}

void loop() {
  // Define the pattern for the letter "B"
  byte patternB[] = {
    B001110001,
    B001001001,
    B001001001,
    B001110001,
    B001001001,
    B001001001,
    B001110001,
    B000000001
  };

  // Display "B" at the start
  displayCharacter(patternB, 0, 0);
}