;; Core rebellion codeset wriiten by Uri Wilensky. Modified by Charles Harry to include modified measures of utility over time breed [agents agent] breed [cops cop] ;;;;;;;;;;;;;;;;;;;;;;;Defining Varibles;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; globals [ k ;;factor for determining arrest probablity ;;;;;;;;;;;;;;;;;;Slider Variables;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Threshold is by how much must G > N to make someone rebel? ;; Copy Density is how many copy is the field you want to deploy ;; Agent Density is how many agents you want in the field ;; movement? is a true or false variable that allows for movement ;; income-variability is a variable to add to Utility in present period to account for changes in income. ] agents-own ;; defining variables for agents [ risk-aversion ;; R, fixed for the agent's lifetime, ranging from 0-1 (inclusive) perceived-hardship ;; H, a function of utility H(utilityn) utilityn ;; Utility in period N utilityn-1 ;; Utility in period n-1 utilityn-2 ;; Utility in period n-2 utilityn-3 ;; Utility in period n-3 utilityn-4 ;; Utility in period n-4 utilityn-5 ;; Utility in period n-5 active? ;; if true, then the agent is actively rebelling jailterm ;; how many turns in jail remain (if 0, the agent is not in jail) personallegitimacy ;; agents personal legitimacy shadowutilityn ;; Utility without stimulus intervention shadowutilityn-1 ;; Utility without stimulus intervention period n-1 shadowutilityn-2 ;; Utility without stimulus intervention period n-2 shadowutilityn-3 ;; Utility without stimulus intervention period n-3 shadowutilityn-4 ;; Utility without stimulus intervention period n-4 shadowutilityn-5 ;; Utility without stimulus intervention period n-5 ] patches-own ;; defining variable for patches [ neighborhood ;; surrounding patches within the vision radius ;vision ;; value of vision ] ;;;;;;;;;;;;;;;;;;;;;Begining Setup Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to setup ca ;; clear the model set k 2.3 ;; set arrest probablity to 2.3 ask patches [ set pcolor gray - 1 ;; sets the patches background color to dark gray set neighborhood patches in-radius vision ;; cache patch neighborhood ] create-cops round (initial-cop-density * .01 * count patches) ;; Creating cops [ move-to one-of patches with ;;move a cop to a random patch "where the following exists..." [ not any? turtles-here ;;no turtles exist in this patch ] display ] create-agents round (initial-agent-density * .01 * count patches) ;;creating agent [ move-to one-of patches with ;; move a agent to a random patch "where the following exists..." [ not any? turtles-here ;; no turtles exist in this patch ] set heading 0 ;; heading of the turtle set risk-aversion random-float 1.0 ;; sets a random number for the tutrles risk adversion set perceived-hardship random-normal mean-strt-income stddev-strt-income ;; sets a random number for percieved hardship set utilityn perceived-hardship ;; sets hardship and utilityn as the same set utilityn-1 utilityn ;; sets the previous periods utility to the same set utilityn-2 utilityn ;; sets the previous periods utility to the same set utilityn-3 utilityn ;; sets the previous periods utility to the same set utilityn-4 utilityn ;; sets the previous periods utility to the same set utilityn-5 utilityn ;; sets the previous periods utility to the same set active? false ;; sets the flag for active to false set jailterm 0 ;; sets inital state of jailterm to 0 set color blue ;; sets color of agent blue set personallegitimacy government-legitimacy ;; sets individual legitimacy based on change to income display ] ;; update plots ;; plot inital state of the system end ;;;;;;;;;;;;;;;;;;;;;;;;;; Start of the Go Procedure ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to go ask turtles ; All Turtle Specific Commands [ if (breed = agents and jailterm = 0) or breed = cops ; If it is a agent not in jail or a cop [ Move ; Move Procedure -- Rule M ] if breed = agents and jailterm = 0 ; Rule A: Determine if each agent sould be active or quiet [ determine-behavior ] if breed = cops ; Rule C: Cops arrest a random active agent within their radius [ enforce ] ] ask agents ; Only Agent Breed Commands [ if jailterm > 0 ; If Jailterm is greater than 0 then [ set jailterm jailterm - 1 ; Reduce Jailterm by 1 ] ] ask agents [ display-agent ; Updates the agent disply ] ask cops [ display-cop ; Updates the cop display ] tick ; Advance the clock update-plots ; Update all Plots end ;;;;;;;;;;;;;;;;;;;;;;;;Agent and Cop Behavior & the Move Procedure;;;;;;;;;;;;;;;;;;;;: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;; Start of Move Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to move if movement? or (breed = cops) ; If movement? is on or the breed is a cop [ let targets neighborhood with ; set local variable "targets" to neighborhood where [ not any? cops-here and all? agents-here ; there are no cops and there are agents with all agents here have a jailterm > 0 [ jailterm > 0] ] if any? targets ; If any targets move to one of the targets [ move-to one-of targets ] if breed = agents [ if shock = true and ticks >= start-of-shock and ticks <= end-of-shock [ ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Sets the following conditions if ticks are in the range of a crisis;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; set utilityn-5 utilityn-4 ; Sets Utility in N-5 as Utility in N-4 set utilityn-4 utilityn-3 ; Sets Utility in N-4 as Utility in N-3 set utilityn-3 utilityn-2 ; Sets Utility in N-3 as Utility in N-2 set utilityn-2 utilityn-1 ; Sets Utility in N-2 as Utility in N-1 set utilityn-1 utilityn ; Sets Utility in N-1 as Utility in N set utilityn utilityn + random-normal mean-income stddev-income - Period-Utility-Loss-During-Shock ; Shocks the agent with a loss of utility based on the user defined variable if utilityn > 1 ; If Utilityn is larger than 1 [ set utilityn 1 ; sets Utilityn as 1 (Bounds Utility to 1) ] if utilityn < 0 ; If Utilityn is less than 0 [ set utilityn 0 ; sets utiltyn to 0 (Bounds Utility to zero) ] ] ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Sets the following conditions if the ticks are NOT in the range of a crisis;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; set utilityn-5 utilityn-4 ; Sets Utility in N-5 as Utility in N-4 set utilityn-4 utilityn-3 ; Sets Utility in N-4 as Utility in N-3 set utilityn-3 utilityn-2 ; Sets Utility in N-3 as Utility in N-2 set utilityn-2 utilityn-1 ; Sets Utility in N-2 as Utility in N-1 set utilityn-1 utilityn ; Sets Utility in N-1 as Utility in N set utilityn utilityn + random-normal mean-income stddev-income ; Sets Utility in present as previous plus some random number within a distribution of mean and std dev ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Determines if it is the period before the start of stimulus and then sets the shadow utility variable;;;;;;;;;;;;;;;;;;;;;; if ticks = start-of-stimulus - 1 [ set shadowutilityn utilityn ] ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Determines if and when the stimulus should begin ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; if stimulus = true and ticks >= start-of-stimulus and ticks <= end-of-stimulus [ set utilityn utilityn + Stimulus-gain ] ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;Determines end of stimulus period and then removes all of stimulus provided;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; if stimulus = true and ticks = end-of-stimulus [ set utilityn shadowutilityn ] if utilityn > 1 ; If Utilityn is larger than 1 [ set utilityn 1 ; sets Utilityn as 1 (Bounds Utility to 1) ] if utilityn < 0 ; If Utilityn is less than 0 [ set utilityn 0 ; sets utiltyn to 0 (Bounds Utility to zero) ] ] ] end ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;Agent Behavior;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;; Start of the Determine-Behavior Procedure;;;;;;;;;;;;;;;;;;;; to determine-behavior set active? (grievance - risk-aversion * estimated-arrest-probability > threshold) ; Uses formula to determine activity end ;;;;;;;;;;;;;;;;;;;;;;;;;;Set Grievence Reporter;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to-report grievance report ( 1 - (utilityn + utilityn-1 + utilityn-2 + utilityn-3 + utilityn-4 + utilityn-5 ) / 6 ) * ( 1 - government-legitimacy ) ; Determines the Grievence value used in the rebellion determiniation end ;;;;;;;;;;;;;;;;;;;;;;;;;;Set estimated-arrest-probability Reporter;;;;;;;;;;;;;;;;;;;; to-report estimated-arrest-probability let C count cops-on neighborhood ; Counts the number of cops in a neighborhood let A 1 + count (agents-on neighborhood) with [active?] ; report 1 - exp (- k * floor (C / A)) ; Arrest Probaility calculation end ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;Cop Behavior;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;; Start of the Enforce Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to enforce if any? (agents-on neighborhood) with [active?] ; If any agents on a neighboorhood are active [ ;; arrest suspect let suspect one-of (agents-on neighborhood) with [active?] ; set local variable suspect as one of the active agents in the neighborhooh ask suspect [ set active? false ; set active? variable back to false set jailterm random max-jailterm ; set jailterm as a random variable upto the maximum jailterm specified ] move-to suspect ;; move to patch of the jailed agent ; moves a cop to the patch of the jailed agent ] end ;;;;;;;;;;;;;;;;;;;;;;;;;; Start the Display-Agent Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;; to display-agent ifelse visualization = "2D" ; Reads the chooser button [ display-agent-2D ] ; If the dropdown is listed as 2D it runs this procedure [ display-agent-3D ] ; If it is false it runs the 3D procedure end to display-agent-2D ;; agent procedure set shape "circle" ifelse active? [ set color red ] [ ifelse jailterm > 0 [ set color black + 3 ] [ set color scale-color green grievance 1.5 -0.5 ] ] end to display-agent-3D ;; agent procedure set color scale-color green grievance 1.5 -0.5 ifelse active? [ set shape "person active" ] [ ifelse jailterm > 0 [ set shape "person jailed" ] [ set shape "person quiet" ] ] end ;;;;;;;;;;;;;;;;;;;;;;;;;; Start the Display-cop Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; to display-cop set color cyan ifelse visualization = "2D" [ set shape "triangle" ] [ set shape "person soldier" ] end ;;;;;;;;;;;;;;;;;;;;;;;;;;Start the update-plots Procedure;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; PLOTTING to update-plots let active-count count agents with [active?] let jailed-count count agents with [jailterm > 0] let average-utility mean [utilityn] of agents let average-general-discontent mean [grievance - risk-aversion * estimated-arrest-probability] of agents let count-of-about-to-rebel count agents with [grievance - risk-aversion * estimated-arrest-probability > .1] let count-of-low-income-agents count agents with [utilityn < .25] file-open "output.txt" ; Write to output file file-write average-utility file-write average-general-discontent file-write count-of-low-income-agents file-write count-of-about-to-rebel file-write active-count file-print " " file-close set-current-plot "Active agents" plot active-count set-current-plot "All agent types" set-current-plot-pen "active" plot active-count set-current-plot-pen "jailed" plot jailed-count set-current-plot-pen "quiet" plot count agents - active-count - jailed-count set-current-plot "Average Utility and Discontent" set-current-plot-pen "Utility" plot average-utility set-current-plot-pen "Discontent" plot average-general-discontent set-current-plot "Agent Sentiment" set-current-plot-pen "Rebelling" plot active-count set-current-plot-pen "About to Rebel" plot count-of-about-to-rebel set-current-plot-pen "Low Income Agents" plot count-of-low-income-agents end @#$#@#$#@ GRAPHICS-WINDOW 222 51 661 511 16 16 13.0 1 10 1 1 1 0 1 1 1 -16 16 -16 16 0 0 1 ticks BUTTON 350 10 414 43 Setup setup NIL 1 T OBSERVER NIL NIL NIL NIL SLIDER 9 42 195 75 initial-cop-density initial-cop-density 0 100 5 .1 1 % HORIZONTAL SLIDER 9 75 195 108 initial-agent-density initial-agent-density 0 100 70 1 1 % HORIZONTAL SLIDER 9 109 195 142 threshold threshold 0 1 0.2 .01 1 NIL HORIZONTAL SWITCH 565 524 657 557 movement? movement? 0 1 -1000 SLIDER 9 142 196 175 government-legitimacy government-legitimacy 0 1 0.7 .01 1 NIL HORIZONTAL BUTTON 423 10 486 43 NIL go T 1 T OBSERVER NIL NIL NIL NIL SLIDER 9 176 196 209 max-jailterm max-jailterm 0 50 15 1 1 NIL HORIZONTAL CHOOSER 469 523 561 568 visualization visualization "2D" "3D" 0 MONITOR 668 165 794 210 # of agents count ( agents ) 17 1 11 MONITOR 667 114 793 159 # of cops count ( cops ) 17 1 11 MONITOR 668 10 793 55 Active Agents (Red) count (agents) with [active?] 17 1 11 PLOT 828 11 1317 161 Active agents Ticks #of Active Agents 0.0 100.0 0.0 10.0 true false PENS "default" 1.0 0 -2674135 true "active-count" 1.0 0 -2674135 true PLOT 1319 185 1573 335 All Agent Types Ticks # of Agents 0.0 1000.0 0.0 1000.0 true true PENS "default" 1.0 0 -16777216 true "active" 1.0 0 -2674135 true "jailed" 1.0 0 -7500403 true "quiet" 1.0 0 -10899396 true MONITOR 668 60 793 105 Jailed Agents count agents with [jailterm > 0] 17 1 11 INPUTBOX -1 281 103 341 mean-income 0 1 0 Number INPUTBOX 105 282 207 342 stddev-income 0 1 0 Number PLOT 830 359 1314 509 Average Utility and Discontent Ticks Utility (0-1) 0.0 200.0 0.0 1.0 true true PENS "Utility" 1.0 0 -10899396 true "Discontent" 1.0 0 -16777216 true PLOT 829 187 1315 337 Agent Sentiment Ticks # of agents 0.0 50.0 0.0 200.0 true true PENS "Rebelling" 1.0 0 -2674135 true "About to Rebel" 1.0 0 -955883 true "Low Income Agents" 1.0 0 -13345367 true MONITOR 668 216 795 261 About to Rebel count agents with [grievance - risk-aversion * estimated-arrest-probability > .1 ]\n 17 1 11 MONITOR 668 269 793 314 Average Utility mean [utilityn] of agents 17 1 11 INPUTBOX 114 365 219 425 Period-Utility-Loss-During-Shock 0.01 1 0 Number SWITCH 5 540 108 573 stimulus stimulus 1 1 -1000 SWITCH 0 379 103 412 shock shock 1 1 -1000 INPUTBOX 113 528 217 588 Stimulus-gain 0.01 1 0 Number SLIDER 9 10 195 43 vision vision 0 20 7 1 1 NIL HORIZONTAL MONITOR 667 321 814 366 Low Income Agents count agents with [utilityn < .25] 17 1 11 MONITOR 668 375 814 420 Low-Mid Income Agents count agents with [utilityn > .25 and utilityn < .51 ] 17 1 11 MONITOR 668 429 814 474 High-Mid Income Agents count agents with [utilityn > .51 and utilityn < .76 ] 17 1 11 MONITOR 670 483 814 528 High Income Agents count agents with [utilityn > .76] 17 1 11 INPUTBOX 2 216 102 276 Mean-strt-income 0.9 1 0 Number INPUTBOX 103 216 209 276 Stddev-Strt-Income 0.01 1 0 Number TEXTBOX 60 507 150 539 Policy-Options 13 0.0 1 TEXTBOX 83 348 118 366 Shock 13 0.0 1 INPUTBOX 13 600 101 660 start-of-stimulus 70 1 0 Number INPUTBOX 115 600 216 660 end-of-stimulus 80 1 0 Number INPUTBOX -1 435 103 495 start-of-shock 60 1 0 Number INPUTBOX 114 436 218 496 end-of-shock 70 1 0 Number @#$#@#$#@ WHAT IS IT? ----------- This model introduces the concept of multiperiod utility which drives the concept of "hardhsip" in the rebellion model. This is a diversion of what we see in the standard rebellion model. This introduces a multi-period utility concept where each time period is equally weighted. The intertemporal change is set as a random number as part of a random number drawn from a normal distribution with a mean and std dev set by the user. HOW IT WORKS ------------ This section could explain what rules the agents use to create the overall behavior of the model. HOW TO USE IT ------------- Interesting Results: Zero Growth Model 0 growth .3std dev , .2 threshold, .65 legitimacy, 3.5% cop density, 85% Agent Density --> Breakout of violence BEFORE the shock. Note after breakout of violence the persistency continues. Slight positive growth +.01 per tick in income --> No breakout of violence even during 10 period utility loss Slight negative growth --> No violent outbreak until around tick 400. No break out during the utility loss in period 60-70 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 true 0 Polygon -7500403 true true 150 5 40 250 150 205 260 250 airplane true 0 Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 box false 0 Polygon -7500403 true true 150 285 285 225 285 75 150 135 Polygon -7500403 true true 150 135 15 75 150 15 285 75 Polygon -7500403 true true 15 75 15 225 150 285 150 135 Line -16777216 false 150 285 150 135 Line -16777216 false 150 135 15 75 Line -16777216 false 150 135 285 75 bug true 0 Circle -7500403 true true 96 182 108 Circle -7500403 true true 110 127 80 Circle -7500403 true true 110 75 80 Line -7500403 true 150 100 80 30 Line -7500403 true 150 100 220 30 butterfly true 0 Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240 Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240 Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163 Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165 Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225 Circle -16777216 true false 135 90 30 Line -16777216 false 150 105 195 60 Line -16777216 false 150 105 105 60 car false 0 Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180 Circle -16777216 true false 180 180 90 Circle -16777216 true false 30 180 90 Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89 Circle -7500403 true true 47 195 58 Circle -7500403 true true 195 195 58 circle false 0 Circle -7500403 true true 0 0 300 circle 2 false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 cow false 0 Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167 Polygon -7500403 true true 73 210 86 251 62 249 48 208 Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123 cylinder false 0 Circle -7500403 true true 0 0 300 dot false 0 Circle -7500403 true true 90 90 120 face happy false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240 face neutral false 0 Circle -7500403 true true 8 7 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Rectangle -16777216 true false 60 195 240 225 face sad false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183 fish false 0 Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166 Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165 Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60 Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166 Circle -16777216 true false 215 106 30 flag false 0 Rectangle -7500403 true true 60 15 75 300 Polygon -7500403 true true 90 150 270 90 90 30 Line -7500403 true 75 135 90 135 Line -7500403 true 75 45 90 45 flower false 0 Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135 Circle -7500403 true true 85 132 38 Circle -7500403 true true 130 147 38 Circle -7500403 true true 192 85 38 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 Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240 house false 0 Rectangle -7500403 true true 45 120 255 285 Rectangle -16777216 true false 120 210 180 285 Polygon -7500403 true true 15 120 150 15 285 120 Line -16777216 false 30 120 270 120 leaf false 0 Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195 Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195 line true 0 Line -7500403 true 150 0 150 300 line half true 0 Line -7500403 true 150 0 150 150 pentagon false 0 Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120 person false 0 Circle -7500403 true true 110 5 80 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 plant false 0 Rectangle -7500403 true true 135 90 165 300 Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285 Polygon -7500403 true true 165 255 210 210 255 195 225 255 165 285 Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210 Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135 Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135 Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60 Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90 sheep false 0 Rectangle -7500403 true true 151 225 180 285 Rectangle -7500403 true true 47 225 75 285 Rectangle -7500403 true true 15 75 210 225 Circle -7500403 true true 135 75 150 Circle -16777216 true false 165 76 116 square false 0 Rectangle -7500403 true true 30 30 270 270 square 2 false 0 Rectangle -7500403 true true 30 30 270 270 Rectangle -16777216 true false 60 60 240 240 star false 0 Polygon -7500403 true true 151 1 185 108 298 108 207 175 242 282 151 216 59 282 94 175 3 108 116 108 target false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 Circle -7500403 true true 60 60 180 Circle -16777216 true false 90 90 120 Circle -7500403 true true 120 120 60 tree false 0 Circle -7500403 true true 118 3 94 Rectangle -6459832 true false 120 195 180 300 Circle -7500403 true true 65 21 108 Circle -7500403 true true 116 41 127 Circle -7500403 true true 45 90 120 Circle -7500403 true true 104 74 152 triangle false 0 Polygon -7500403 true true 150 30 15 255 285 255 triangle 2 false 0 Polygon -7500403 true true 150 30 15 255 285 255 Polygon -16777216 true false 151 99 225 223 75 224 truck false 0 Rectangle -7500403 true true 4 45 195 187 Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194 Rectangle -1 true false 195 60 195 105 Polygon -16777216 true false 238 112 252 141 219 141 218 112 Circle -16777216 true false 234 174 42 Rectangle -7500403 true true 181 185 214 194 Circle -16777216 true false 144 174 42 Circle -16777216 true false 24 174 42 Circle -7500403 false true 24 174 42 Circle -7500403 false true 144 174 42 Circle -7500403 false true 234 174 42 turtle true 0 Polygon -10899396 true false 215 204 240 233 246 254 228 266 215 252 193 210 Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105 Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87 Polygon -10899396 true false 85 204 60 233 54 254 72 266 85 252 107 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99 wheel false 0 Circle -7500403 true true 3 3 294 Circle -16777216 true false 30 30 240 Line -7500403 true 150 285 150 15 Line -7500403 true 15 150 285 150 Circle -7500403 true true 120 120 60 Line -7500403 true 216 40 79 269 Line -7500403 true 40 84 269 221 Line -7500403 true 40 216 269 79 Line -7500403 true 84 40 221 269 x false 0 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 4.1 @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ default 0.0 -0.2 0 1.0 0.0 0.0 1 1.0 0.0 0.2 0 1.0 0.0 link direction true 0 Line -7500403 true 150 150 90 180 Line -7500403 true 150 150 210 180 @#$#@#$#@ 0 @#$#@#$#@