state-machine idle 
  events
    door-closed D1CL
    draw-opened D2OP
    light-on    L1ON
 
  commands
    lock-panel  PNLK
    unlock-door D1UL
 
  state idle
    = door-closed active
    actions unlock-door lock-panel
 
  state active
    = draw-opened waiting-for-light
    = light-on    waiting-for-draw

Which is more readable to a non-Lisper?

The latest incarnation is in Genyris (http://sourceforge.net/projects/genyris/). This time the language is modified to suit indentation’s constraints, it looks like Ruby without ends. The rule is: If the indentation looks right the code will be too.

e.g.

class Person ()
   def !valid? (obj)
      obj
         bound? !age
 
class Boomer (Person)
   def !valid? (obj)
      obj
         between 45 !age 60
 
class Hippie (Boomer)
   def !valid? (obj)
      obj
         bound? !bong
 
define noel
  dict
     !name: "Noel"
     !age: 49
     !bong: true
 
classify Person noel
 
assert
  and
    is-instance? noel Hippie

1. You already do look at the indentation level, and not the parens;
2. … moreover, most people change the paren color so they are close to the background color, making them actually disappear (mine are dark gray against a black background);
3. the output of the parens inserter is awful:

(defun factorial (n)
  (if (<= n 1)
    (the 1
    )(* n
      (factorial (- n 1)
))))

Nobody would indent their code nor place their parens like that. Instead, they would write:

(defun factorial (n)
  (if (<= n 1)
      (the 1)
      (* n (factorial (- n 1)))))

Frankly, I don’t see the point of the Lispin project. But, to each his own!