Random Grid Walk Example

to setup
  clear-all
  crt 1                                 ;; create one turtle
  [
    set color orange
    set size 3                          ;; make it easier to see
    face one-of neighbors4              ;; face N, E, S, or W
    pen-down                            ;; have it draw its path
  ]
  reset-ticks
end 

to walk1
  ask turtles [
    face one-of neighbors4              ;; face N, E, S, or W
    forward 1                           ;; advance one step
  ]
  tick
end 

to walk2
  ask turtles [
    rt one-of [-90 0 90]                ;; go left, straight, or right
    forward 1                           ;; advance one step
  ]
  tick
end 


; Public Domain:
; To the extent possible under law, Uri Wilensky has waived all
; copyright and related or neighboring rights to this model.