turtle from Python Interpreter

http://docs.python.org/library/turtle.html

To activate turtle from Python Interpreter enter:

from turtle import *

# This imports Turtle and all of its commands.

turtle commands:

forward(distance)
 - Moves the turtle forward by the specified distance, in the direction the turtle is headed.

backward(distance)
- Move the turtle backward by distance, opposite to the direction the turtle is headed. Does not change the turtle’s heading.

right(angle) - Turn turtle right by angle units. (Units are by default degrees)

left(angle)
- Turn turtle left by angle units. (Units are by default degrees)

 goto (x,y)
     or
setposition (x,y)

-  Moves the turtle to coordinates (x,y) and if the pen is down, draw a line.

home( )
-  Moves the turtle back to (0,0)

circle (radius, extent)
- Draws a circle with radius.
- extent refers to the number of degrees (e.g. 180 = semicircle)

 undo( )
- Undo (repeatedly) the last turtle action. speed(speed)
 - Sets how fast the turtle will draw (1-10 arbitrary units)

position( )
- Returns the (x,y) coordinates of the turtle.

pendown( )
- Puts the pen down so it draws when the turtle moves.

penup( )
- Puts the pen up so it does not draw when the turtle moves.

pencolor(colorstring)
-  if colorstring == a color like "green" it will draw the line in that color.

reset( )
- Delete everything and set turtle back to 0

clear()
- Delete drawings but keeps turtle where it is.