from turtle import *
tracer(0)
r =45
for i in  range(15):
    goto(xcor() + 10 * r, ycor() + 10 * r)
    goto(xcor() + 3 * r, ycor() - 6 * r)
    goto(xcor() - 9 * r, ycor() + 3 * r)
update()
up()
for x in range(0, 20):
    for y in range(0, 20):
        goto(x*r, y*r)
        dot(5, "blue")
exitonclick()