0 2 4 6 7
8 9 10 11 12

0 2 4 2 0
 8 9 10 9 8

0 2 4 2 2
8 9 10 8 8

import java.util.Scanner;
 public class Mirror {
public static void main (String [] args)
{

    Scanner kb = new Scanner (System.in);
    System.out.println("Please enter number of rows: ");
    int rows = kb.nextInt();

    System.out.println("Please enter number of columns:");
    int columns = kb.nextInt();

    int [][] mirror = new int [rows][columns];

    int sum =0;

    for (int r = 0; r<mirror.length; r++)
    {
        for (int c = 0; c<mirror[r].length ; c++)
        {
            mirror[r][c]= sum;

            sum= sum+2;
        }
    }

    for (int r = 0; r<mirror.length; r++)
    {
        for (int c = 0; c<mirror[r].length ; c++)
        {
        System.out.print (mirror[r][c]+ " ");
        }
        System.out.println();

    }

    int add = 0;
    for (int r = 0; r<mirror.length; r++)
    {
        for (int c = mirror[r].length/2 +1; c<mirror[r].length ; c++)
        {
            for (int x= 0; x<mirror[r].length/2; x=x++)
            {
                mirror[r][c] = mirror [r][x];

            }

        }
    }

    System.out.println();

    for (int r = 0; r<mirror.length; r++)
    {
        for (int c = 0; c<mirror[r].length ; c++)
        {
        System.out.print (mirror[r][c]+ " ");
        }
        System.out.println();

    }
}