;; Setup the "turtles" in the world.
;; A turtle is an object that is placed in the world.

;; This world contrains trees and butterflies.
;; Each item in the world has a breed type for the plural form of its name
;; followed by a singular form of it's name.
breed [trees tree]
breed [butterflies butterfly]

;; Global variables used in the world.
globals[at-tree]

;; Variables of the butterfly
butterflies-own[sleeping]

;; Setup the world.
to setup

  ;; Clear everything.
  clear-all
  
  ;; Create one tree.
  create-trees 1
  
  ;; Tree 0 is the first tree. Netlogo starts counting from 0.
  set at-tree 0
  
  ;; Create new butterflies.
  ;; The amount of butterflies to create is a variable that is the slider in the
  ;; interface of the world. Instead of amount-of-butterflies, a number, such as 5 could
  ;; be used to represent the amount to create.
  create-butterflies amount-of-butterflies   
  
  
  ;; Ask the trees to do something.
  ;; Set their color to be green. Set their shape to be a tree. Set their size to be 3
  ;; patches big. A patch is a square box in the world. Think of it like a tile on the
  ;; floor.
  ;; A tree is a name I gave it. To make it look like a tree I need to set it's shape.
  ask trees [
    set color green
    set shape "tree"
    set size 3
   ]
  
  ;; Set to the butterflies to have a butterfly shape.
  ;; Set them at some random x,y location in the world.
  ;; If you don't set a location, such as when I placed the tree, the default
  ;; is the middle of the screen.
  ;;
  ;; Set their color to red.
  ;; To make them fly towards the tree, I set their heading to tree 0.
  ;;
  ;; I used a property called sleeping to define if the butterfly has stopped moving.
  ;; The sleeping properly is false.
  ask butterflies  [
    set shape "butterfly"
    
    ;; move each butterfly to a random point
    setxy random-xcor random-ycor
    
    set color red   
    set heading towards tree 0
    set sleeping false
  ]  
  
   
end


;; As the world progresses.
to go

  ;; Check to see what is happening with the butterflies
  ask butterflies [

    ;; If not near the tree move towards the tree.
    if distance tree 0 >= 2 [
      forward 1
    ]
    
    ;; If near the tree and not sleeping go to sleep.
    ;; Increment the count that shows how many butterflies are out the tree.
    if (distance tree 0) < 2 and not sleeping[
      set sleeping true
      set at-tree at-tree + 1
    ]    
    
  
  ]
  
  ;; Plot on the butterflies plot.
  ;; Plot how many butterflies are at the tree.
    set-current-plot "butterflies"
    plot at-tree
    
  ;; When all the butterflies made it to the tree, stop the world.
  if(at-tree = amount-of-butterflies)[stop]

  ;; Pause for a half of a second before updating the world again.
  wait .5
end
@#$#@#$#@
GRAPHICS-WINDOW
205
10
644
444
16
15
13.0
1
10
1
1
1
0
1
1
1
-16
16
-15
15
0
0
1
ticks

CC-WINDOW
5
458
653
553
Command Center
0

BUTTON
8
12
100
45
NIL
Setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL

MONITOR
22
193
80
242
At Tree
at-tree
0
1
12

BUTTON
137
10
200
43
NIL
Go
T
1
T
OBSERVER
NIL
NIL
NIL
NIL

PLOT
-5
63
203
183
Butterflies
Time
Landed
0.0
30.0
0.0
10.0
true
true
PENS
"Tree" 1.0 0 -16777216 true

SLIDER
21
299
201
332
amount-of-butterflies
amount-of-butterflies
0
10
2
1
1
NIL
HORIZONTAL

@#$#@#$#@
WHAT IS IT?
-----------
This section could give a general understanding of what the model is trying to show or explain.


HOW IT WORKS
------------
This section could explain what rules the agents use to create the overall behavior of the model.


HOW TO USE IT
-------------
This section could explain how to use the model, including a description of each of the items in the interface tab.


THINGS TO NOTICE
----------------
This section could give some ideas of things for the user to notice while running the model.


THINGS TO TRY
-------------
This section could give some ideas of things for the user to try to do (move sliders, switches, etc.) with the model.


EXTENDING THE MODEL
-------------------
This section could give some ideas of things to add or change in the procedures tab to make the model more complicated, detailed, accurate, etc.


NETLOGO FEATURES
----------------
This section could point out any especially interesting or unusual features of NetLogo that the model makes use of, particularly in the Procedures tab.  It might also point out places where workarounds were needed because of missing features.


RELATED MODELS
--------------
This section could give the names of models in the NetLogo Models Library or elsewhere which are of related interest.


CREDITS AND REFERENCES
----------------------
This section could contain a reference to the model's URL on the web if it has one, as well as any other necessary credits or references.
@#$#@#$#@
default
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airplane
true
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arrow
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box
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Polygon -7500403 true true 150 135 15 75 150 15 285 75
Polygon -7500403 true true 15 75 15 225 150 285 150 135
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circle 2
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Circle -7500403 true true 85 40 38
Circle -7500403 true true 177 40 38
Circle -7500403 true true 177 132 38
Circle -7500403 true true 70 85 38
Circle -7500403 true true 130 25 38
Circle -7500403 true true 96 51 108
Circle -16777216 true false 113 68 74
Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218
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house
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0
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Polygon -7500403 true true 15 120 150 15 285 120
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leaf
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line
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line half
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pentagon
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Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90
Rectangle -7500403 true true 127 79 172 94
Polygon -7500403 true true 195 90 240 150 225 180 165 105
Polygon -7500403 true true 105 90 60 150 75 180 135 105

person lumberjack
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Polygon -2674135 true false 60 196 90 211 114 155 120 196 180 196 187 158 210 211 240 196 195 91 165 91 150 106 150 135 135 91 105 91
Circle -7500403 true true 110 5 80
Rectangle -7500403 true true 127 79 172 94
Polygon -6459832 true false 174 90 181 90 180 195 165 195
Polygon -13345367 true false 180 195 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285
Polygon -6459832 true false 126 90 119 90 120 195 135 195
Rectangle -6459832 true false 45 180 255 195
Polygon -16777216 true false 255 165 255 195 240 225 255 240 285 240 300 225 285 195 285 165
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Line -16777216 false 150 135 150 165
Polygon -2674135 true false 100 30 104 44 189 24 185 10 173 10 166 1 138 -1 111 3 109 28

person police
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0
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Polygon -13345367 true false 134 91 149 106 134 181 149 196 164 181 149 106 164 91
Polygon -13345367 true false 180 195 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285
Polygon -13345367 true false 120 90 105 90 60 195 90 210 116 158 120 195 180 195 184 158 210 210 240 195 195 90 180 90 165 105 150 165 135 105 120 90
Rectangle -7500403 true true 123 76 176 92
Circle -7500403 true true 110 5 80
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Line -13345367 false 121 90 194 90
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Rectangle -16777216 true false 109 183 124 227
Rectangle -16777216 true false 176 183 195 205
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Circle -1 true false 152 166 9
Polygon -1184463 true false 172 112 191 112 185 133 179 133
Polygon -1184463 true false 175 6 194 6 189 21 180 21
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plant
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Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135
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square
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square 2
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star
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target
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Circle -7500403 true true 65 21 108
Circle -7500403 true true 116 41 127
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Circle -7500403 true true 104 74 152

triangle
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Polygon -7500403 true true 150 30 15 255 285 255

triangle 2
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truck
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wheel
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Line -7500403 true 40 84 269 221
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x
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Polygon -7500403 true true 270 75 225 30 30 225 75 270
Polygon -7500403 true true 30 75 75 30 270 225 225 270

@#$#@#$#@
NetLogo 4.0.4
@#$#@#$#@
setup
set grass? true
repeat 75 [ go ]
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
default
0.0
-0.2 0 0.0 1.0
0.0 1 1.0 0.0
0.2 0 0.0 1.0
link direction
true
0
Line -7500403 true 150 150 90 180
Line -7500403 true 150 150 210 180

@#$#@#$#@