Hi y'all :)
In this pdf I will show you in video links and a small written pattern how to make a simple mosaic border around an interlocking filet crochet square so you can sew them easily together. You can also use this to make a border to hide fringe, but please take care of your stich count as it might differ :)
Enjoy,
Anneke
 
(Haloweenies squares pattern not included, this is only a guide how to make the border!)