This macro just bugs your arms as if you were lying down. The macro is suitable for making fun of your friends. It is worth using those who have keys 1 2 3 4 5 assigned to weapons. (can be changed) If you want the arms to move faster or slower, change the maros in the editor.
Download the program (Download) and go to the macro editor
press the button «Open file»
and select the downloaded file
assign a macro to a key and run the program