Purely Functional Retrogames: http://prog21.dadgum.com/23.html http://prog21.dadgum.com/23.html And his conclusions: http://prog21.dadgum.com/37.html http://p

Purely Functional Retrogames: http://prog21.dadgum.com/23.html http://prog21.dadgum.com/23.html And his conclusions: http://prog21.dadgum.com/37.html http://prog21.dadgum.com/37.html This walkthrough is in Erlang but same patterns apply.