from turtle import right, left, forward, speed, exitonclick, hideturtle

def dragon(level=4, size=200, direction=45):
    if level:
        right(direction)
        dragon(level-1, size/1.41421356237, 45)
        left(direction * 2)
        dragon(level-1, size/1.41421356237, -45)
        right(direction)
    else:
        forward(size)

speed(0)
hideturtle()
dragon(6)
exitonclick() # click to exit