There are many variations on the theme, and churches are free to do their own thing (so to speak), but the four candles must have these specific colors because each one represents a significant part of Advent.
Many families have their own wreaths to help teach children about Advent. As a result there are many pictures of Advent wreaths on Pinterest that can give ideas for creating your own.
Finding purple and rose quilts...not so easy. In fact, I'm really pushing the limits with these quilts. That's quite all right: I didn't expect to find many Advent quilts, but purple and rose are quite pretty together. Surely there's a grandma out there who had the idea.
If so, grandma is not posting much on Pinterest. Here's hoping you have a great week before Christmas and are not too stressed.