class Turtle

direction: Direction of the turtle
pen_color: Pen color of the turtle

Base class: Object

Inherited classes: Empty

Description: represents a turtle in a graphic window

back|bk(): Advances the turtle backward to the specified distance
clear|cs(): Clears all turtle lines
ellipse(): Draws an ellipse: the ellipse will be drawn inside the bounding rectangle defined by the current turtle point, as an upper-left point, and the given point parameter as the bottom-right point
forward|fd(): Advances the turtle forward to the specified distance
hide_turtle|ht(): Hides the turtle
left(): Turns the turtle left with the specified angle. If no parameter is given, turns the turtle 90 degrees left.
pen_down|pd(): Puts the pen down - the turtle movement now draws lines
pen_erase|pe(): Changes pen move to erase - the turtle movement now deletes lines and points which are on its path
pen_normal|pn(): Sets the pen mode to normal (no erasing)
pen_up|pu(): Sets the pen in "Up" mode - turtle movements will not draw lines
position|pos(): Sets/Gets the turtle position
redo(): Redoes the last draw operation that was undo
reset(): Resets the pen state and the turtle state: the turtles set at point (0,0) facing north, and the pen state is down (writing)
show_turtle|st(): Shows the turtle
null(): Puts the turtle at point (0,0) facing north
null(): Turns the turtle right with the specified angle. If no parameter is given, turns the turtle 90 degrees right.
null(): Draws a line to given point
null(): Undoes the last draw operation