private static char[][] getMatrix(String[] b) {
        char[][] bm = new char[b[0].length()][b[0].length()];
        for (int i = 0; i < b.length; i++) {
            for (int j = 0; j < b.length; j++) {
                bm[i][j] = b[i].charAt(j);
            }
        }
        return bm;
    }
Why Did you create this class? what does it do?
src/adventofcode/FractalArt_21.java