mandi provides commands for introductory physics. To install, open a command
line  and  type  the  following,  repeating 2-4 until there are no warnings:

1. lualatex mandi.ins  (can also use latex)
2. lualatex mandi.dtx  (lualatex is required)
3. makeindex -s gind.ist -o mandi.ind mandi.idx
4. makeindex -s gglo.ist -o mandi.gls mandi.glo

Move the *.sty files into a directory searched by TeX.
The vdemo.py file is not needed.