from turtle import *
tracer(0)
r = 50
for i in range(7):
    goto(xcor() + 6 * r, ycor() - 9 * r)
    goto(xcor() - 6 * r, ycor() + 2 * r)
    goto(xcor() + 12 * r, ycor() + 3 * r)
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()