import turtle

# Create a new window
wm = turtle.Screen()
# Set title to: Intro to turtles
wm.title("Intro to turtles")
# Set the window's color to grey
wm.bgcolor("grey")
# Place the window at the top left corner
#    with width of 800 pixels
#    and height of 800 pixel
# wm.setup(600, 600, 0, 0)


# width - if an integer, a size in pixels, if a float, a fraction of the screen; default is 50 % of screen
# height - if an integer, the height in pixels, if a float, a fraction of the screen; default is 75 % of screen
# startx - if positive, starting position in pixels from the left edge of the screen, if negative from the right edge, if None, center window horizontally
# startx - if positive, starting position in pixels from the top edge of the screen, if negative from the bottom edge, if None, center window vertically

tom = turtle.Turtle()

tom.shape("triangle")
# tom.stamp()
tom.penup()

for i in range(12):
    tom.forward(100)
    tom.pendown()
    tom.forward(30)
    tom.penup()
    tom.forward(20)
    tom.stamp()
    tom.penup()
    tom.back(100)
    tom.left(360/12)

wm.mainloop()