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
6 f9 H1 A5 ?  ?8 Zto make-turtles
    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
! F' @- g  _  h5 [8 Q      create-initial-turtles num-random       "random"       brown
3 d9 `7 ?3 p. l      create-initial-turtles num-random-away  "random-away"  pink
0 O: g; o3 K  E2 l  u* d; \9 L      create-initial-turtles num-open-min     "open-min"     blue
      create-initial-turtles num-open-min-max "open-min-max" orange ]
7 I6 u. t  o; O  set-common-variables
end
& L: y: s+ `  |' X2 N1 [
1 ]! i  _+ [" e! t; pto create-initial-turtles [n turtle-rule turtle-color]
0 i( T! w* J# \% K- f$ ]9 l  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
# n6 |! _2 p( ^+ K  S' V  [ sprout 1
6 X- m3 x: g5 X1 i7 g    [ set rule turtle-rule
      set color turtle-color ] ]
  A, b3 O9 k1 C% @2 I; \+ ]end
- {5 _5 F7 L2 L+ a, G0 U; n" N
[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]