I saw this somewhere on the internet. NOT Pinterest, I don't go there. The idea was to make votive holders or whatever they are called for Halloween. Many of them were elaborate. I wanted simple. Then, I found this one. (I don't have a link. I'm not even sure it HAD a link. I may have adapted what I found and gone from there!)
Recycling for Halloween
Easy Glass Votives
This is a simple idea you can use for any reason. You find a pattern you want (bat) and trace it out on painter's tape.