(defvar *myself* nil)
(defvar *self* nil)
(defvar *dimensions* nil)
(defvar *topology* :torus)
(defstruct turtle who color heading xcor ycor)
(defvar *myself* nil)
(defvar *self* nil)
(defvar *dimensions* nil)
(defvar *topology* :torus)
(defstruct turtle who color heading xcor ycor)