from turtle import *

shape('turtle')
setup(440, 80)

def p(x, y):
    penup(), setpos(x, y)
    pendown()
    setheading(0)

def fill_circle(x, y, r, c = ""):
    p(x, y - r)
    color("black", c)
    begin_fill()
    circle(r)
    end_fill()
    
speed(0)
hideturtle()
x = -200; y = 15
r = 10
while x < 200: 
    fill_circle(x, y, r);
    x += 20
done()