Box - icarus challenge

@echo off
title Icarus Challenge 2
setlocal enabledelayedexpansion
::This script is based on assigning a variable to every position in the box
::m#1#2 #1 is the vertical assignment and #2 is the horizontal assignment
for /l %%a in (0,1,10) do (
for /l %%b in (0,1,20) do (
set m%%a%%b=
if "%%a" == "0" set m%%a%%b=#
if "%%a" == "10" set m%%a%%b=#
if "%%b" == "0" set m%%a%%b=#
if "%%b" == "20" set m%%a%%b=#
)
)

set /p input= Please enter the text that you would like to see displayed in the box:
for /l %%c in (0,1,200) do (
if "!input:~%%c,1!"=="" set total=%%c &goto next1
)

:next1
if %total% GTR 18 goto multi
set /a left=18 - %total%
set /a end1=(%left%)/ 2
set /a end2=18 - ((%left%) / 2)
set /a temp=((%left% + 3) / 2 ) - 1
if %end1% LSS %temp% set /a end1=%end1% + 1
set text=%input%

for /l %%h in (0,1,%end1%) do (
set text= !text!
)
set verti1=4
set verti2=4
set inputpos=0
for /l %%d in (0,1,%end2%) do (
set m%verti1%%%d=!input:~%%d,1!
)


:setvars
for /l %%e in (0,1,%end2%) do (
set m%verti1%%%e=!text:~%%e,1!
)
set m%verti1%0=#
goto show


:show
for /l %%f in (0,1,10) do (
for /l %%g in (0,1,20) do (
set line%%f=!line%%f!!m%%f%%g!
)
echo !line%%f!
)

pause