Домашно - знак СТОП

import java.util.Scanner;

public class marinovauprajnenie {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

            // top
               int n = scan.nextInt();
                int i = 0;
                while( i < n + 1 ) {
                      System.out.print(".");
                       i++;
                }
                    i = 0;
                while (i < 2 * n + 1) {
                    System.out.print("_");
                        i++;
                }
                     i = 0;
                while( i < n + 1 ) {
                     System.out.print(".");
                        i++;
                    }
                System.out.println("");

            int LeftDots = n;
            int RightDots = n;
            int underscore = 2 * n - 1;

                int red = 0;
                while(red < n) {
                    i = 0;
                 while(i < LeftDots) {
                      System.out.print(".");
                    i++;
                 }

                  System.out.print("//");

                  i = 0;
                    while(i < underscore) {
                          System.out.print("_");
                          i++;
                }
                      System.out.print("\\\\");

                   i = 0;
                   while(i < RightDots) {
                       System.out.print(".");
                       i++;
                   }
                   System.out.println();

                   RightDots--;
                   LeftDots--;
                   underscore += 2;
                   red++;
                }
          // STOP

                   System.out.print("//");
              i = 0;
              while(i < (underscore - 5) / 2) {
                  System.out.print("_");
                  i++;
              }

              System.out.print("STOP!");

              i=0;
              while(i < (underscore - 5) / 2) {
                  System.out.print("_");
                i++;
              }

              System.out.print("\\\\");

              System.out.println();

              // bot

            int Leftdots = 0;
            int Rightdots = 0;
            int Underscore = 4 * n - 1;

                int redove = 0;
                while(redove < n) {
                    i = 0;
                 while(i < Leftdots) {
                      System.out.print(".");
                    i++;
                 }

                  System.out.print("\\\\");

                  i = 0;
                    while(i < Underscore) {
                          System.out.print("_");
                          i++;
                }
                      System.out.print("//");

                 i = 0;
                 while(i < Rightdots) {
                   System.out.print(".");
                   i++;
                 }
                 System.out.println();

                 Rightdots++;
                 Leftdots++;
                 Underscore -= 2;
                 redove++;
                }



 }
}