import turtle

wn = turtle.Screen()                # create window for turtle t1 to draw
wn.bgcolor("white")                 # set background color of the window

t1 = turtle.Turtle()
t1.shape("arrow")

t1.circle(100)
t1.circle(50)
t1.circle(-50)
t1.circle(-100)

wn.mainloop()           # wait for user to close the window