// This program produces as output an ASCII art representation of a mirror.
// This version includes a class constant for drawing mirrors of different
// sizes.  The constant SIZE represents the number of lines in one half of the
// overall figure.
//
// We noticed that there were 12 ='s in the solid line for a size of 3 versus
// 16 for a size of 4, so we made this table to develop an expression for the
// number of ='s to use:
//
//    SIZE	='s
//     3	12
//     4	16
//
//		4 * SIZE
//
// Then we used this table to recompute an expression for spaces and dots:
//
//    line	spaces			dots
//     1	  4			  0
//     2	  2			  4
//     3	  0			  8
// 
// 		-2 * line + 6	        4 * line - 4
//
// Then we made a table that showed the different formulas for different sizes
// so that we could develop an expression that correctly adjusted for size:
//
//    SIZE	spaces		        dots
//     3	-2 * line + 6	        4 * line - 4
//     4	-2 * line + 8	        4 * line - 4
//
//		-2 * line + 2 * SIZE    (unchanged)

public class Mirror2 {
    public static final int SIZE = 7;  // change this to scale the mirror

    public static void main(String[] args) {
        drawLine();
        drawTopHalf();
        drawBottomHalf();
        drawLine();
    }
    
    // outputs a solid line
    public static void drawLine() {
        System.out.print("#");
        for (int i = 1; i <= 4 * SIZE; i++) {
            System.out.print("=");
        }
        System.out.println("#");
    }
    
    // outputs the top half of the mirror
    public static void drawTopHalf() {
        for (int line = 1; line <= SIZE; line++) {
            System.out.print("|");
            for (int spaces = 1; spaces <= (-2 * line + 2 * SIZE); spaces++) {
                System.out.print(" ");
            }
            System.out.print("<>");
            for (int dots = 1; dots <= (4 * line - 4); dots++) {
                System.out.print(".");
            }
            System.out.print("<>");
            for (int spaces = 1; spaces <= (-2 * line + 2 * SIZE); spaces++) {
                System.out.print(" ");
            }
            System.out.println("|");
        }
    }
    
    // same as top half only in reverse order
    public static void drawBottomHalf() {
        for (int line = SIZE; line >= 1; line--) {
            System.out.print("|");
            for (int spaces = 1; spaces <= (-2 * line + 2 * SIZE); spaces++) {
                System.out.print(" ");
            }
            System.out.print("<>");
            for (int dots = 1; dots <= (4 * line - 4); dots++) {
                System.out.print(".");
            }
            System.out.print("<>");
            for (int spaces = 1; spaces <= (-2 * line + 2 * SIZE); spaces++) {
                System.out.print(" ");
            }
            System.out.println("|");
        }
    }
}