breeds [ boys girls ]

to setup ;; executed once each time we press the SETUP button  
  ca  ;; clear all patches and turtles
  set-default-shape boys "boy-shape"
  create-boys boys-num  ;; create BOYS-NUM number of turtles of breed BOYS
                        ;; BOYS-NUM equals the current value of the BOYS-NUM slider
  set-default-shape girls "girl-shape"
  create-girls girls-num  ;; create GIRLS-NUM number of turtles of breed GIRLS
                          ;; GIRLS-NUM equals the current value of the GIRLS-NUM slider
  ask boys [  
    set color blue 
  ]

  ask girls [  
    set color red
  ]

  ask turtles [                     ;; includes both boys and girls
    setxy (random-float screen-size-x) 0  ;; disperse turtles along X axis
    set heading  0                  ;; point all turtles up (north)
  ]
end

to move-boys
  ask boys [    ;; ask all turtles of breed BOYS, 
    fd 1        ;; to move forward by 1
  ] 
end

to move-girls
  ask girls [   ;; ask all turtles of breed GIRLS, 
    fd 1        ;; to move forward by 1
  ] 
end

to kill-boys
  ask boys [    ;; ask all turtles of breed BOYS
    die         ;; to die
  ]  
end

to kill-girls
  ask girls [   ;; ask all turtles of breed GIRLS
    die         ;; to die
  ]
end
@#$#@#$#@
GRAPHICS-WINDOW
272
10
672
431
6
6
30.0
1
10
1
1
1

CC-WINDOW
9
263
261
400
Command Center

BUTTON
138
191
255
229
Girls Disappear
kill-girls
NIL
1
T
OBSERVER
T

BUTTON
12
191
122
229
Boys Disappear
kill-boys
NIL
1
T
OBSERVER
T

BUTTON
138
142
227
180
NIL
move-girls
NIL
1
T
OBSERVER
T

BUTTON
43
142
122
181
NIL
move-boys
NIL
1
T
OBSERVER
T

BUTTON
27
10
219
46
setup
setup
NIL
1
T
OBSERVER
T

SLIDER
6
103
243
136
girls-num
girls-num
0
5
5
1
1
NIL

SLIDER
5
62
243
95
boys-num
boys-num
0
5
5
1
1
NIL

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WHAT IS IT?
-----------
This code example shows how to create and control groups of turtles, i.e. breeds. 

It also shows how to set the default shape of a breed, so all turtles with that breed will have that shape.

If you want to create your own shapes, press the SHAPES button on the right-hand side of the toolbar, click the "New" button, and draw your own shape!
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default
true
0
Polygon -7566196 true true 150 5 40 250 150 205 260 250

boy-shape
false
0
Circle -7566196 true true 107 15 84
Line -7566196 true 150 75 150 224
Line -7566196 true 150 150 74 135
Line -7566196 true 150 149 224 135
Line -7566196 true 150 224 195 284
Line -7566196 true 150 226 105 284

girl-shape
false
0
Circle -7566196 true true 107 15 84
Line -7566196 true 150 75 150 224
Line -7566196 true 150 150 74 135
Line -7566196 true 150 149 224 135
Line -7566196 true 150 224 195 284
Line -7566196 true 150 226 105 284
Polygon -7566196 true true 150 99 105 267 195 267

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NetLogo 2.0beta4
@#$#@#$#@
setup
repeat 2 [ move-girls ]
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