The first step toward learning to program in PostScript is to get an interpreter, either a printer or an emulator (see resource list), a copy of the PostScript Language Reference Manual (the red book) ...

This article is a tutorial introduction to PostScript programming in the Macintosh environment. We begin with a description of the context and form of the language, then ease into a practical ...

You need to have haskell stack installed: https://docs.haskellstack.org/en/stable/ Then, simply: stack run to enter a PostScript REPL. stack test to run the unit ...