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
. q! q: a6 a1 u" M: ito make-turtles
: N5 Z+ {3 n8 Q" U9 v& ]+ I' R    ask patch 0 0 [
      create-initial-turtles num-random-min   "random-min"   violet
2 h  S7 a0 b* u  t/ @      create-initial-turtles num-random       "random"       brown
      create-initial-turtles num-random-away  "random-away"  pink
      create-initial-turtles num-open-min     "open-min"     blue
8 X/ B+ v0 Z' N1 M* D0 O$ U9 @" U5 \      create-initial-turtles num-open-min-max "open-min-max" orange ]
' d# D6 q6 T- k6 K4 ?" T- C  set-common-variables
end

8 g4 A+ ~! d/ n% I$ Q/ I9 Qto create-initial-turtles [n turtle-rule turtle-color]
  ask n-of n (patches in-radius initial-radius with [not any? turtles-here])
1 J, X  y2 c2 h  Y: m  [ sprout 1
/ D8 n  N8 g/ V. j    [ set rule turtle-rule
2 g4 J: H) ^- b2 F      set color turtle-color ] ]
end
) J  }1 [- f0 V# h! X  K
& h, ?% w* {* R, a" `" k& S[ 本帖最后由 etamina 于 2008-4-30 13:05 编辑 ]