The built-in %RANDOM% environment variable and GOTO statement can be used for infinite loop.
@echo off
mode 400
color 03
:label
echo %random% %random% %random% %random% %random% %random% %random% %random% %random% %random% %random% %random%
goto label
pause
Type GOTO/? in CMD window for more information as I have done:
C:\Users\ajeet> GOTO/?
Directs cmd.exe to a labeled line in a batch program.
GOTO label
The label specifies a text string used
in the batch program as a label. You
type a label on a line by itself, beginning with a colon. If Command Extensions are enabled GOTO
changes as follows: GOTO command now
accepts a target label of :EOF which transfers control to the end of the
current batch script file. This is an
easy way to exit a batch script file without defining a label. Type CALL /?
for a description of extensions to the CALL command that make this
feature useful.

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