@echo off
title 窗口动画
setlocal enabledelayedexpansion
:ab
call :aa
pause>nul
goto ab
:aa
set space=                                        
set space2=
set line=
set max=17
set max2=0
set a=0
:a
if "%a%"=="18" exit /b
set space=!space!
set space2=!space2!    
set line=____!line!
set disp=!space!!line!
set /a max-=1
if %max2% lss 20 set /a max2+=1
cls
for /l %%i in (1 1 !max!) do (echo.)
echo !disp!
for /l %%i in (1 1 !max2!) do (echo.!space!^|!space2!^|)
echo !disp!
ping -n 1 127.1>nul
set /a a+=1
goto a
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