bbcode v0.1

[bbcode]
[title="Hello World"]
[author="Anonymous"]

[main]
  [let="a"]5[/let]
  [while]a>0[do]
  [let="a"]a-1[/let]
  Hello, World!
  [val="a"]
  [/do]
  [/while]
  [call="test"]
[/main]

[test]
hihihi world!
[/test]

[/bbcode]

suggest and improve.

Well if we find some syntax maybe we could use lex and yacc to write the interpreter?
It will be very funny if /prog/ actually manages to create a decent language.