[SoftUni Java] ExamPreparation 03.ProgrammerDNA

import java.util.Scanner;


public class _03_ProgrammerDNA {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner input = new Scanner(System.in);
        int totalLength = input.nextInt();
        char printChar = input.next().charAt(0);

        char spaceChar = '.';

        int blockSize = 7;
        int midPoint = blockSize / 2;
        int diff = 0;
        int diffCounter = 0;

        for (int counter = 0; counter < totalLength; counter++){
            // Print Block
            for (int i = 0; i < blockSize; i++){
                if (i >= midPoint - diff && i <= midPoint + diff){
                    System.out.print(printChar);

                    // Change Letter
                    if (printChar == 'G'){
                        printChar = 'A';
                    }
                    else{
                        printChar++;
                    }
                }
                else{
                    System.out.print(spaceChar);
                }
            }

            if (diffCounter >= midPoint){
                diff--;
            }
            else{
                diff++;
            }

            diffCounter++;

            if (diffCounter == blockSize){
                diffCounter = 0;
                diff++;
            }

            System.out.println();
        }
    }

}