语法看不懂，能帮忙解释一下吗？

etamina

下面的语句中ask patch和create-initial-turtles 后面接的[ ]中的语句是什么含义，其中非原语的都是定义的全局或者外部变量。语法有点奇怪，谁能帮我解释一下吗？多谢
+ a6 x$ e* F. M7 K' a6 fto make-turtles
    ask patch 0 0 [
% V6 B3 @+ `, W- ?) t+ F+ ]      create-initial-turtles num-random-min   "random-min"   violet
' t, N* }+ j$ t      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
: g% [- {) a7 R! N  V7 R7 W      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
  set-common-variables
* H; R  R* V9 j* {  cend
& Z' y. ]5 |6 L+ P: p1 F; f
to create-initial-turtles [n turtle-rule turtle-color]
2 h" @) Q6 k& p; o( F. W6 F  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
1 f3 [7 E5 Z4 o+ M2 u  [ sprout 1
    [ set rule turtle-rule
3 P  {/ h. H- g3 @7 `$ e0 J      set color turtle-color ] ]
" k7 [6 N2 X( _. F# q( D$ x  |( hend
1 O6 ?5 b" F3 ^4 E$ {0 m! p# [) B# X
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]