import turtle

turtle.shape('turtle')
def circle_lf(x, y):
    for i in range(60):
        turtle.forward(x)
        turtle.left(y)

def circle_rg(x, y):
    for i in range(60):
        turtle.forward(x)
        turtle.right(y)

turtle.speed(30)
turtle.left(90)
x = 4
for i in range(20):
    circle_lf(x, 6)
    circle_rg(x, 6)
    x += 0.5