# import turtle as t
k = 30  
t.tracer(0) 
t.setup(width=800, height=800)  
t.up()
for x in range(-20, 20):
    for y in range(-20, 20):
        t.goto(x * k, y * k)
        t.dot(3)
t.home()
t.left(90)
t.down()
t.color('red')
for _ in range(7):
    t.forward(10 * k)
    t.right(120)
t.update()
t.done()