turtle template

# import turtle library
import turtle

''' global Constants and variables'''

XOFFSET = 12 # Do not change margin offsets
YOFFSET = 14 # Do not change margin offsets
NORTH = 90
EAST = 0
SOUTH = 270
WEST = 180
width = 300  # Width of window drawing area
height = 300 # height of window drawing area

'''
example: turtle.setheading(NORTH)
'''

def reposition(pen, position):
    ''' Moves the turtle to one of the window corners '''
    pen.pu()
    if position == "topright":
        pen.setpos(width * 0.5 - XOFFSET * 0.2, height * 0.5 + YOFFSET * 0.2)
    elif position == "topleft":
        pen.setpos(-width * 0.5 - XOFFSET * 0.2, height * 0.5 + YOFFSET * 0.2)
    elif position == "bottomright":
        pen.setpos(width * 0.5 - XOFFSET * 0.2, -height * 0.5 + YOFFSET * 0.2)
    elif position == "bottomleft":
        pen.setpos(-width * 0.5 - XOFFSET * 0.2, -height * 0.5 + YOFFSET * 0.2)
    pen.pd()

def main():
    global width, height        # allow changing value of width and height
    '''  Set Window size and background colour '''
    width = 400                 # set window width here
    height = 400                # set window height here
    window = turtle.Screen()    # create a window
    window.setup(width + XOFFSET, height + YOFFSET) # allow for title and borders
    turtle.colormode(255)
    turtle.bgcolor((200, 255, 255))     # change background colour

    ''' example for green arrow shaped turtle facing east top left corner '''
    fred = turtle.Pen()         # create a new turtle called 'fred'
    fred.shape('arrow')         # choose 'arrow', 'turtle', 'circle', 'square'. 'triangle', 'classic'
    fred.color('green')         # set colour to green

    ''' add your code here '''
    # reposition(fred, 'topleft')   # set position to top left of the window
    # fred.setheading(EAST)     # set to face east

    turtle.done()               # MUST BE LAST STATEMENT!
main()