求一简单批处理程序

@echo off
set n=11
:loop
set /a n-=1
echo/Time Left: %n%s
for /l %%i in (1,1,2000) do set %%i=<nul
cls
if %n% equ 1 goto :end
goto :loop
:end
pause>nul

@echo off
ping -10 127.0.0.1>nul
echo 9
ping -10 127.0.0.1>nul
echo 8
ping -10 127.0.0.1>nul
echo 7
ping -10 127.0.0.1>nul
echo 6
ping -10 127.0.0.1>nul
echo 5
ping -10 127.0.0.1>nul
echo 4
ping -10 127.0.0.1>nul
echo 3
ping -10 127.0.0.1>nul
echo 2
ping -10 127.0.0.1>nul
echo 1
ping -10 127.0.0.1>nul
pause

抱歉上面的写错了
@echo off
ping -n 2 127.0.0.1>nul
echo 9
ping -n 2 127.0.0.1>nul
echo 8
ping -n 2 127.0.0.1>nul
echo 7
ping -n 2 127.0.0.1>nul
echo 6
ping -n 2 127.0.0.1>nul
echo 5
ping -n 2 127.0.0.1>nul
echo 4
ping -n 2 127.0.0.1>nul
echo 3