import turtle as t
t.tracer (0)
k=20
t.left(90)
t.right(60)
for i in range (11):
    t.forward(36*k)
    t.right(72)
t.up()
for x in range (-20,20):
    for y in range (-20,20):
        t.goto(x*k,y*k)
        t.dot(4)
t.done()