Really simple to do and nice to wear :)
P.S.: My English isn't good so please be lenient to me O:)
First of all you need to iron your lace. SET LOW TEMPERATURE!!!
Than if you have wide lace, fold it.
Cut the lace and cross it in the same way like in the picture.
Wind a thread around the middle of the lace and knot it.
Sew a ribbon to the middle of the lace and fasten safety pin to it.
And you have done! :)
By using lighter let the end of the ribon scorched.