from turtle import *
tracer(0)
r = 45
for i in range(36):
    rt(60)
    fd(1 * r)
    rt(60)
    fd(1 * r)
    rt(270)
up()
for x in range(-20, 20):
    for y in range(-20, 20):
        goto(x * r, y * r)
        dot(3, 'blue')
goto(0, 0)
update()
exitonclick()