@echo off
echo.
echo.
echo.
setlocal enabledelayedexpansion
set b=/—\/—\
set 速度=1
set 退格=
:b
for /l %%i in (0,1,200) do call :a %%i
goto :b
:a
set/a a=%1%%4
set/p=!b:~%a%,1!<nul
ping/n %速度% 127.1>nul
set/p=%退格%<nul
goto :eof
@echo off
echo.
echo.
echo.
setlocal enabledelayedexpansion
set b=/—\/—\
set 速度=1
set 退格=
:b
for /l %%i in (0,1,200) do call :a %%i
goto :b
:a
set/a a=%1%%4