I actually saw this on someone else's post. I was inspired and I decided that had to try it myself. I got the glass beads from the dollar store, and an antique old window from a local shop in my town. I picked up one tube of clear silicone.
I first washed the windows, then planned what I wanted to do... I decided to use the first initials of a couple I know who are getting married. I did try to do their last name letter, G. But I just could not get it to work for me. So instead I used their initials.
I would apply a little silicone then press on the beads.