turtle粘合patch的运动问题

lincw

请问：
5 j8 x1 y7 V" O0 J" `随机产生的turtle 已经在patch的坐标上上下左右一格格运动，当turtle碰到一个随即分布的patch以一定概率粘合,patch变色，其他turtle经过也还是以一定概率粘合的，粘合后turtle的能量就会转变到patch上，并且以一定速率消耗它，怎么编写这个过程？下面是我编写的，运行时就出错了。怎么改正呢？


turtles-own [ energy ]
to setup
clear-all
set-default-shape turtles "square"
3 q/ b' e3 U" g& ]- _; c! f7 `crt nutrition
$ Y* U+ L0 r( U- u0 ~, ^ask turtles[
    set color white
    setxy random-pxcor random-pycor]
  
" F, q& B$ y8 F+ Wask n-of microbes-initialization patches
    [ set pcolor green]
9 q( H8 G; Z7 j+ Y3 X5 Q ask turtles [set energy  1]
end
2 i! i, E! O- C2 ~% q( }  r/ Y$ H, i
to go
+ z2 k( ]4 p8 L+ A; v' j    ask turtles [set heading 90 * random 4    fd 1]
# Q2 ^4 t# |" f4 _, _* H     ask patches  with [ any? turtles-here]
5 Q- W$ I4 P9 ?0 i( [    [  if pcolor = green and random 100 < chance-of-congregating [tt ]]
     ask turtles [ if energy = 0  [die ]]
end
3 P9 |, G: D* R& J1 ^3 b' U
to tt
ask patches [set pcolor gray ]
2 u) f! a/ T+ v4 t4 {2 G. dask  turtles [set energy energy - 1]
end
7 X! ~3 u% H" X# x0 u: T: y& R
! o) K; `2 @" c' d4 ?

lincw

谢谢楼上两位，后来自己用两种turtle来表示暂时把问题解决了，以后再出现难题再向你们请教啊