private static void reverseM(char[] a) {
        int i = 0;
        int j = a.length - 1;
        while (i < j) {
            char temp = a[i];
            a[i] = a[j];
            a[j] = temp;
            i++;
            j--;
        }
    }
Why Did you create this class? what does it do?
src/adventofcode/FractalArt_21.java